B01D 2239/0464
Impregnants
B01D2239/0464 (Impregnants) appears on 190 US grants and 195 published applications in this corpus.
Search patents in B01D- Granted patents
- 190
- Published applications
- 195
- Assignees
- 193
- Inventors
- 630
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 9 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 2 |
| 2002 | 4 | 2 |
| 2003 | 1 | 1 |
| 2004 | 0 | 4 |
| 2005 | 2 | 4 |
| 2006 | 2 | 4 |
| 2007 | 2 | 6 |
| 2008 | 1 | 3 |
| 2009 | 1 | 4 |
| 2010 | 4 | 9 |
| 2011 | 3 | 6 |
| 2012 | 5 | 7 |
| 2013 | 4 | 4 |
| 2014 | 1 | 1 |
| 2015 | 2 | 4 |
| 2016 | 7 | 6 |
| 2017 | 5 | 7 |
| 2018 | 0 | 5 |
| 2019 | 4 | 7 |
| 2020 | 5 | 5 |
| 2021 | 5 | 14 |
| 2022 | 4 | 27 |
| 2023 | 5 | 22 |
| 2024 | 10 | 21 |
| 2025 | 14 | 13 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Preparation method of bismuth ion filter membrane and application thereof15 Sep 2026US 12,734,470 B2Work Together Marketing Consultant Limited
- Filter material for air filter and method for producing filter material14 Jul 2026US 12,678,724 B2Hokuetsu Corporation
- Unit for filtering leukocytes with reduced platelet adhesion7 Jul 2026US 12,673,147 B2Maco Pharma
- Non-passive anti-viral and nanofilter based respirators2 Jun 2026US 12,643,063 B1University of Louisville Research Foundation, Inc.
- Oil purification filter5 May 2026US 12,616,925 B2Skf Recondoil AB
- Fluorocarbon-free filtration media9 Jul 2026US 2026/0192223 A1Unifrax I LLC
- Filter containing pharmaceutical salt for a face mask, breathable face mask containing the filter, and method of manufacturing18 Jun 2026US 2026/0166349 A1
- Filtration medium14 May 2026US 2026/0131269 A1
- Dual-layer gas filters and systems and methods for making the same9 Apr 2026US 2026/0097341 A1DelStar Technologies, Inc.
- Ethylene oxide neutralizing material incorporating ion exchange resins2 Apr 2026US 2026/0091381 A1ChemDAQ Inc.
Most cited
By later US patents
- Novel porous fabric136US 4,438,167 ABiax-Fiberfilm Corporation · 1984
- Clean room air filtering135US 5,626,820 A1997
- Antimicrobial filter cartridge129US 5,868,933 A1999
- Molten metal filtration and distribution device and method for manufacturing the same116US 6,270,717 B1Les Produits Industriels de Haute Temperature Pyrotek Inc. · 2001
- Filter sheet material109US 4,510,193 A1985