B01D 67/00931
By introduction of specific groups after membrane formation
Official title: {by introduction of specific groups after membrane formation, e.g. by grafting}
B01D67/00931 (By introduction of specific groups after membrane formation) appears on 533 US grants and 556 published applications in this corpus.
Search patents in B01D- Granted patents
- 533
- Published applications
- 556
- Assignees
- 361
- Inventors
- 1,575
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 8 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 12 | 0 |
| 1988 | 9 | 0 |
| 1989 | 17 | 0 |
| 1990 | 17 | 0 |
| 1991 | 28 | 0 |
| 1992 | 13 | 0 |
| 1993 | 7 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 8 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 3 |
| 2002 | 6 | 14 |
| 2003 | 9 | 14 |
| 2004 | 8 | 23 |
| 2005 | 6 | 19 |
| 2006 | 7 | 17 |
| 2007 | 10 | 16 |
| 2008 | 6 | 17 |
| 2009 | 12 | 20 |
| 2010 | 8 | 22 |
| 2011 | 10 | 18 |
| 2012 | 10 | 22 |
| 2013 | 17 | 22 |
| 2014 | 14 | 24 |
| 2015 | 14 | 19 |
| 2016 | 18 | 20 |
| 2017 | 8 | 17 |
| 2018 | 17 | 22 |
| 2019 | 19 | 26 |
| 2020 | 24 | 33 |
| 2021 | 24 | 35 |
| 2022 | 21 | 37 |
| 2023 | 20 | 33 |
| 2024 | 19 | 24 |
| 2025 | 25 | 17 |
| 2026 | 10 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Surface-treated porous materials having filtration properties and methods of preparing them18 Aug 2026US 12,708,879 B2Aculon, Inc.
- Semiconductive and proton-conductive porous hydrogen-bonded frameworks4 Aug 2026US 12,697,593 B2Technische UniversitäT Berlin
- Tetravalent boron-containing proton-exchange solid supports and methods of making and using tetravalent boron-containing proton-exchange solid supports12 May 2026US 12,626,945 B21s1 Energy, Inc.
- Surface-modified polyethersulfone membranes and method of making thereof5 May 2026US 12,616,941 B2Life Technologies Corporation
- Polyamide composite reverse osmosis membrane and preparation method thereof21 Apr 2026US 12,605,679 B2Hunan Keensen Technology Co., Ltd.
- Purification process of ethyl formate27 Aug 2026US 2026/0249251 A1Taicang Hushi Reagent Co., Ltd.
- Ceramic cation exchange materials13 Aug 2026US 2026/0233171 A1Membrion, Inc.
- Process for separating and extracting nervonic acid from xanthoceras sorbifolium bunge13 Aug 2026US 2026/0234504 A1Nanchang University
- Composite semipermeable membrane, composite semipermeable membrane module, fluid separation device, and method for producing composite semipermeable membrane6 Aug 2026US 2026/0225045 A1Toray Industries, Inc.
- Biosensor materials6 Aug 2026US 2026/0227395 A1The Regents of the University of California
Most cited
By later US patents
- Multicomponent membranes for gas separations355US 4,230,463 AMonsanto Company · 1980
- Novel protein-immobilizing hydrophobic polymeric membrane, process for producing same and apparatus employing same285US 3,966,580 AUniversity of Utah · 1976
- Preparation of crosslinked matrices containing covalently immobilized chemical species and unbound releasable chemical species253US 5,563,056 ABSI Corporation · 1996
- Porous membrane having hydrophilic surface and process215US 4,618,533 AMillipore Corporation · 1986
- Enzyme-electrode sensor with organosilane treated membrane165US 4,886,740 AImperial Chemical Industries PLC · 1989