Cross-linked cellulose membranes
US-9522365-B2 · Dec 20, 2016 · US
by introduction of specific groups after membrane formation, e.g. by grafting
by introduction of specific groups after membrane formation, e.g. by grafting · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D67/00931 |
| Official title | {by introduction of specific groups after membrane formation, e.g. by grafting} |
| Display label | by introduction of specific groups after membrane formation, e.g. by grafting |
| Total patents | 393 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 23 |
| 2016 | 39 |
| 2017 | 27 |
| 2018 | 33 |
| 2019 | 39 |
| 2020 | 49 |
| 2021 | 47 |
| 2022 | 34 |
| 2023 | 32 |
| 2024 | 34 |
| 2025 | 30 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Programmable membrane system
US-9517438-B2 · Dec 13, 2016 · US
Methods of Making Crosslinked Membranes Utilizing an Inert Gas Atmosphere
US-2016339397-A1 · Nov 24, 2016 · US
Hydrophobic monomers, hydrophobically-derivatized supports, and methods of making and using the same
US-2016325268-A1 · Nov 10, 2016 · US
Semipermeable membrane and manufacturing method therefor
US-9486745-B2 · Nov 8, 2016 · US
Composite polyamide membrane having high acid content and low azo content
US-2016317980-A1 · Nov 3, 2016 · US
Composite polyamide membrane having azo content and high acid content
US-2016310909-A1 · Oct 27, 2016 · US
Filtration method using polyimide nanoweb with amidized surface and apparatus therefor
US-9475009-B2 · Oct 25, 2016 · US
Treatment of aqueous mixtures containing anionic surfactants using fouling resistant reverse osmosis membrane
US-2016303519-A1 · Oct 20, 2016 · US
Separation of hydrocarbons from aqueous mixture using fouling resistant reverse osmosis membrane
US-2016304363-A1 · Oct 20, 2016 · US
Composite polyamide membrane treated with dihyroxyaryl compounds and nitrous acid
US-9452391-B1 · Sep 27, 2016 · US
Composite polyamide membrane treated with dihyroxyaryl compounds and nitrous acid
US-2016271569-A1 · Sep 22, 2016 · US
Adsorptive membranes for trapping viruses
US-2016264942-A1 · Sep 15, 2016 · US
Method for purification of antibody using porous membrane having amino group and alkyl group both bound to graft chain immobilized on porous substrate
US-9441011-B2 · Sep 13, 2016 · US
Sulfated Cellulose Hydrate Membrane, Method for Producing Same, and Use of the Membrane as an Adsorption Membrane for a Virus Purification Process
US-2016257941-A1 · Sep 8, 2016 · US
Catalytic membranes and applications thereof
US-2016256861-A1 · Sep 8, 2016 · US
Cellulose hydrate membrane, method for the production thereof, and use thereof
US-9433904-B2 · Sep 6, 2016 · US
Super-surface selective nanomembranes providing simultaneous high permeation flux and high selectivity
US-2016250601-A1 · Sep 1, 2016 · US
Composite semipermeable membrane and method for manufacturing same
US-2016243503-A1 · Aug 25, 2016 · US
High permeate flux reverse osmosis membrane including surface-treated zeolite and method of manufacturing the same
US-9415351-B2 · Aug 16, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D67/00931?
- CPC B01D67/00931 is the Cooperative Patent Classification code for “by introduction of specific groups after membrane formation, e.g. by grafting.”
- How many patents are filed under CPC B01D67/00931 (by introduction of specific groups after membrane formation, e.g. by grafting)?
- Our database includes 393 publications tagged with this CPC code.
- Is patent activity under CPC B01D67/00931 growing?
- Publication counts under this code: 34 in 2024 vs 30 in 2025 (latest complete years).