Patent
US 10,449,497METHODS OF MAKING GRAPHENE OXIDE NANOFILTERS
David K. Biegelsen
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 10,449,497Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
FIG. 2. The separation distance 106 between the porous substrates 104 is proportional to the amount of space the graphene oxide layers 102 are permitted to …
FIG. 3 illustrates a nanofiltration module or assembly 300 that includes multiple adjustable graphene oxide nanofilters for various filtration systems and/or …
FIG. 4 illustrates a nanofiltration system 400 with tangential flow filtration across an adjustable graphene oxide nanofilter 402. Within the tangential flow …
FIG. 5 illustrates a nanofiltration system 500 with tangential flow filtration across multiple adjustable graphene oxide nanofilters 502 and 504. Within the …
FIG. 6 illustrates a nanofiltration system 600 similar to the nanofiltration system 500 of
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method comprising: depositing graphene oxide layers on a first porous surface; adding a second porous surface atop the graphene oxide; applying pressure to the first and second porous surfaces up to a yield point of the graphene oxide layers beyond which the layers become incompressible; correlating the distance between the first and second porous surfaces to an interlayer gap size e f- between the graphene oxide layers; and determining a filtration cutoff for a filter using the porous surfaces based upon the interlayer gap size. Currently amended
The method of claim 1, wherein depositing graphene oxide layers includes depositing graphene oxide flakes. Original
The method of claim 1, wherein depositing graphene oxide layers is accomplished using vacuum filtration. Original
The method of claim 1, further comprising: determining how many layers of graphene oxide are deposited. Original
The method of claim 1, further comprising: adding a first support plate below the first porous surface; and adding a second support plate above the second porous surface. Original
The method of claim 1, wherein applying pressure to the first and second porous surfaces includes decreasing a distance between the first and second porous surfaces. Original
The method of claim 1, further comprising setting a predetermined distance between the first and second porous surfaces prior to applying pressure. Currently amended
The method of claim 1, further comprising: dividing the first and second porous surfaces and deposited graphene oxide layers into two or more stacks, wherein each stack includes the first and second porous surfaces and deposited graphene oxide layers. Original
Canceled
A method comprising: depositing layers of graphene oxide between a first and second support plate to form a filter module; compressing the first and second support plates; determining the thickness of the compressed graphene oxide layers; immersing the filter module in water; determining a separation distance based on at least one of a desired filtration cutoff and a desired interlayer gap size; and separating the first and second support plates by the separation distance. Original
The method of claim 12, wherein determining the thickness of the compressed graphene oxide layers includes determining how many graphene oxide layers have been deposited. Original
The method of claim 12, wherein determining a separation distance includes: separating the first and second support plates by a set of test distances, determining at least one of an actual filtration cutoff and an actual interlayer gap size, resulting from the test distance, and mapping each test distance against at least one of each determined actual filtration cutoff and actual interlayer gap size. Original
The method of claim 12, further comprising: least one of the determined graphene oxide layers' desired filtration cutoff. Currently amended
The method of claim 12, wherein separating through adjusting a fine pitched screw. Original
(Ori g inal) The method of claim 12, wherein achieved through actuating an inch worm piezo.
The method of claim 12, wherein separating pneumatically. Original
The method of claim 12, further comprising: the graphene oxide layers and first support plate between the graphene oxide layers and second
The method of claim 12, further comprising: first and second support plates after separating the Currently amended determining the separation distance based on at thickness, an actual interlayer gap size, and a the first and second support plates is achieved separating the first and second support plates is Original the first and second support plated is achieved inserting a first porous substrate filter between: and inserting a second porous substrate filter support plate. Original adjusting the separation distance between the first and second support plates initially.
Layer stacks claimed or described, ordered top of device to substrate.
graphene oxide nanofilter (porous substrate sandwich)
graphene oxide filter module (support plate sandwich)
Materials described outside the worked examples.
graphene oxide
graphene oxide flakes
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 10–100 nm | — |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,449,497Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
FIG. 2. The separation distance 106 between the porous substrates 104 is proportional to the amount of space the graphene oxide layers 102 are permitted to …
FIG. 3 illustrates a nanofiltration module or assembly 300 that includes multiple adjustable graphene oxide nanofilters for various filtration systems and/or …
FIG. 4 illustrates a nanofiltration system 400 with tangential flow filtration across an adjustable graphene oxide nanofilter 402. Within the tangential flow …
FIG. 5 illustrates a nanofiltration system 500 with tangential flow filtration across multiple adjustable graphene oxide nanofilters 502 and 504. Within the …
FIG. 6 illustrates a nanofiltration system 600 similar to the nanofiltration system 500 of
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method comprising: depositing graphene oxide layers on a first porous surface; adding a second porous surface atop the graphene oxide; applying pressure to the first and second porous surfaces up to a yield point of the graphene oxide layers beyond which the layers become incompressible; correlating the distance between the first and second porous surfaces to an interlayer gap size e f- between the graphene oxide layers; and determining a filtration cutoff for a filter using the porous surfaces based upon the interlayer gap size. Currently amended
The method of claim 1, wherein depositing graphene oxide layers includes depositing graphene oxide flakes. Original
The method of claim 1, wherein depositing graphene oxide layers is accomplished using vacuum filtration. Original
The method of claim 1, further comprising: determining how many layers of graphene oxide are deposited. Original
The method of claim 1, further comprising: adding a first support plate below the first porous surface; and adding a second support plate above the second porous surface. Original
The method of claim 1, wherein applying pressure to the first and second porous surfaces includes decreasing a distance between the first and second porous surfaces. Original
The method of claim 1, further comprising setting a predetermined distance between the first and second porous surfaces prior to applying pressure. Currently amended
The method of claim 1, further comprising: dividing the first and second porous surfaces and deposited graphene oxide layers into two or more stacks, wherein each stack includes the first and second porous surfaces and deposited graphene oxide layers. Original
Canceled
A method comprising: depositing layers of graphene oxide between a first and second support plate to form a filter module; compressing the first and second support plates; determining the thickness of the compressed graphene oxide layers; immersing the filter module in water; determining a separation distance based on at least one of a desired filtration cutoff and a desired interlayer gap size; and separating the first and second support plates by the separation distance. Original
The method of claim 12, wherein determining the thickness of the compressed graphene oxide layers includes determining how many graphene oxide layers have been deposited. Original
The method of claim 12, wherein determining a separation distance includes: separating the first and second support plates by a set of test distances, determining at least one of an actual filtration cutoff and an actual interlayer gap size, resulting from the test distance, and mapping each test distance against at least one of each determined actual filtration cutoff and actual interlayer gap size. Original
The method of claim 12, further comprising: least one of the determined graphene oxide layers' desired filtration cutoff. Currently amended
The method of claim 12, wherein separating through adjusting a fine pitched screw. Original
(Ori g inal) The method of claim 12, wherein achieved through actuating an inch worm piezo.
The method of claim 12, wherein separating pneumatically. Original
The method of claim 12, further comprising: the graphene oxide layers and first support plate between the graphene oxide layers and second
The method of claim 12, further comprising: first and second support plates after separating the Currently amended determining the separation distance based on at thickness, an actual interlayer gap size, and a the first and second support plates is achieved separating the first and second support plates is Original the first and second support plated is achieved inserting a first porous substrate filter between: and inserting a second porous substrate filter support plate. Original adjusting the separation distance between the first and second support plates initially.
Layer stacks claimed or described, ordered top of device to substrate.
graphene oxide nanofilter (porous substrate sandwich)
graphene oxide filter module (support plate sandwich)
Materials described outside the worked examples.
graphene oxide
graphene oxide flakes
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 10–100 nm | — |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,449,497Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
FIG. 2. The separation distance 106 between the porous substrates 104 is proportional to the amount of space the graphene oxide layers 102 are permitted to …
FIG. 3 illustrates a nanofiltration module or assembly 300 that includes multiple adjustable graphene oxide nanofilters for various filtration systems and/or …
FIG. 4 illustrates a nanofiltration system 400 with tangential flow filtration across an adjustable graphene oxide nanofilter 402. Within the tangential flow …
FIG. 5 illustrates a nanofiltration system 500 with tangential flow filtration across multiple adjustable graphene oxide nanofilters 502 and 504. Within the …
FIG. 6 illustrates a nanofiltration system 600 similar to the nanofiltration system 500 of
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method comprising: depositing graphene oxide layers on a first porous surface; adding a second porous surface atop the graphene oxide; applying pressure to the first and second porous surfaces up to a yield point of the graphene oxide layers beyond which the layers become incompressible; correlating the distance between the first and second porous surfaces to an interlayer gap size e f- between the graphene oxide layers; and determining a filtration cutoff for a filter using the porous surfaces based upon the interlayer gap size. Currently amended
The method of claim 1, wherein depositing graphene oxide layers includes depositing graphene oxide flakes. Original
The method of claim 1, wherein depositing graphene oxide layers is accomplished using vacuum filtration. Original
The method of claim 1, further comprising: determining how many layers of graphene oxide are deposited. Original
The method of claim 1, further comprising: adding a first support plate below the first porous surface; and adding a second support plate above the second porous surface. Original
The method of claim 1, wherein applying pressure to the first and second porous surfaces includes decreasing a distance between the first and second porous surfaces. Original
The method of claim 1, further comprising setting a predetermined distance between the first and second porous surfaces prior to applying pressure. Currently amended
The method of claim 1, further comprising: dividing the first and second porous surfaces and deposited graphene oxide layers into two or more stacks, wherein each stack includes the first and second porous surfaces and deposited graphene oxide layers. Original
Canceled
A method comprising: depositing layers of graphene oxide between a first and second support plate to form a filter module; compressing the first and second support plates; determining the thickness of the compressed graphene oxide layers; immersing the filter module in water; determining a separation distance based on at least one of a desired filtration cutoff and a desired interlayer gap size; and separating the first and second support plates by the separation distance. Original
The method of claim 12, wherein determining the thickness of the compressed graphene oxide layers includes determining how many graphene oxide layers have been deposited. Original
The method of claim 12, wherein determining a separation distance includes: separating the first and second support plates by a set of test distances, determining at least one of an actual filtration cutoff and an actual interlayer gap size, resulting from the test distance, and mapping each test distance against at least one of each determined actual filtration cutoff and actual interlayer gap size. Original
The method of claim 12, further comprising: least one of the determined graphene oxide layers' desired filtration cutoff. Currently amended
The method of claim 12, wherein separating through adjusting a fine pitched screw. Original
(Ori g inal) The method of claim 12, wherein achieved through actuating an inch worm piezo.
The method of claim 12, wherein separating pneumatically. Original
The method of claim 12, further comprising: the graphene oxide layers and first support plate between the graphene oxide layers and second
The method of claim 12, further comprising: first and second support plates after separating the Currently amended determining the separation distance based on at thickness, an actual interlayer gap size, and a the first and second support plates is achieved separating the first and second support plates is Original the first and second support plated is achieved inserting a first porous substrate filter between: and inserting a second porous substrate filter support plate. Original adjusting the separation distance between the first and second support plates initially.
Layer stacks claimed or described, ordered top of device to substrate.
graphene oxide nanofilter (porous substrate sandwich)
graphene oxide filter module (support plate sandwich)
Materials described outside the worked examples.
graphene oxide
graphene oxide flakes
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 10–100 nm | — |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,449,497Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
FIG. 2. The separation distance 106 between the porous substrates 104 is proportional to the amount of space the graphene oxide layers 102 are permitted to …
FIG. 3 illustrates a nanofiltration module or assembly 300 that includes multiple adjustable graphene oxide nanofilters for various filtration systems and/or …
FIG. 4 illustrates a nanofiltration system 400 with tangential flow filtration across an adjustable graphene oxide nanofilter 402. Within the tangential flow …
FIG. 5 illustrates a nanofiltration system 500 with tangential flow filtration across multiple adjustable graphene oxide nanofilters 502 and 504. Within the …
FIG. 6 illustrates a nanofiltration system 600 similar to the nanofiltration system 500 of
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method comprising: depositing graphene oxide layers on a first porous surface; adding a second porous surface atop the graphene oxide; applying pressure to the first and second porous surfaces up to a yield point of the graphene oxide layers beyond which the layers become incompressible; correlating the distance between the first and second porous surfaces to an interlayer gap size e f- between the graphene oxide layers; and determining a filtration cutoff for a filter using the porous surfaces based upon the interlayer gap size. Currently amended
The method of claim 1, wherein depositing graphene oxide layers includes depositing graphene oxide flakes. Original
The method of claim 1, wherein depositing graphene oxide layers is accomplished using vacuum filtration. Original
The method of claim 1, further comprising: determining how many layers of graphene oxide are deposited. Original
The method of claim 1, further comprising: adding a first support plate below the first porous surface; and adding a second support plate above the second porous surface. Original
The method of claim 1, wherein applying pressure to the first and second porous surfaces includes decreasing a distance between the first and second porous surfaces. Original
The method of claim 1, further comprising setting a predetermined distance between the first and second porous surfaces prior to applying pressure. Currently amended
The method of claim 1, further comprising: dividing the first and second porous surfaces and deposited graphene oxide layers into two or more stacks, wherein each stack includes the first and second porous surfaces and deposited graphene oxide layers. Original
Canceled
A method comprising: depositing layers of graphene oxide between a first and second support plate to form a filter module; compressing the first and second support plates; determining the thickness of the compressed graphene oxide layers; immersing the filter module in water; determining a separation distance based on at least one of a desired filtration cutoff and a desired interlayer gap size; and separating the first and second support plates by the separation distance. Original
The method of claim 12, wherein determining the thickness of the compressed graphene oxide layers includes determining how many graphene oxide layers have been deposited. Original
The method of claim 12, wherein determining a separation distance includes: separating the first and second support plates by a set of test distances, determining at least one of an actual filtration cutoff and an actual interlayer gap size, resulting from the test distance, and mapping each test distance against at least one of each determined actual filtration cutoff and actual interlayer gap size. Original
The method of claim 12, further comprising: least one of the determined graphene oxide layers' desired filtration cutoff. Currently amended
The method of claim 12, wherein separating through adjusting a fine pitched screw. Original
(Ori g inal) The method of claim 12, wherein achieved through actuating an inch worm piezo.
The method of claim 12, wherein separating pneumatically. Original
The method of claim 12, further comprising: the graphene oxide layers and first support plate between the graphene oxide layers and second
The method of claim 12, further comprising: first and second support plates after separating the Currently amended determining the separation distance based on at thickness, an actual interlayer gap size, and a the first and second support plates is achieved separating the first and second support plates is Original the first and second support plated is achieved inserting a first porous substrate filter between: and inserting a second porous substrate filter support plate. Original adjusting the separation distance between the first and second support plates initially.
Layer stacks claimed or described, ordered top of device to substrate.
graphene oxide nanofilter (porous substrate sandwich)
graphene oxide filter module (support plate sandwich)
Materials described outside the worked examples.
graphene oxide
graphene oxide flakes
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1. In other embodiments, graphene oxide layers may be compressed between porous support plates, as discussed below and shown in
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 10–100 nm | — |
Related documents with shared materials, methods, properties, or citations.
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