B01D 2239/069
Special geometry of layers
B01D2239/069 (Special geometry of layers) appears on 302 US grants and 281 published applications in this corpus.
Search patents in B01D- Granted patents
- 302
- Published applications
- 281
- Assignees
- 216
- Inventors
- 809
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 12 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 16 | 0 |
| 1998 | 17 | 0 |
| 1999 | 18 | 0 |
| 2000 | 13 | 0 |
| 2001 | 10 | 2 |
| 2002 | 8 | 6 |
| 2003 | 2 | 4 |
| 2004 | 5 | 11 |
| 2005 | 5 | 3 |
| 2006 | 4 | 7 |
| 2007 | 1 | 7 |
| 2008 | 3 | 12 |
| 2009 | 2 | 8 |
| 2010 | 4 | 15 |
| 2011 | 9 | 16 |
| 2012 | 11 | 11 |
| 2013 | 8 | 14 |
| 2014 | 11 | 9 |
| 2015 | 7 | 6 |
| 2016 | 6 | 10 |
| 2017 | 4 | 5 |
| 2018 | 5 | 9 |
| 2019 | 10 | 9 |
| 2020 | 5 | 8 |
| 2021 | 7 | 11 |
| 2022 | 5 | 19 |
| 2023 | 1 | 29 |
| 2024 | 15 | 20 |
| 2025 | 13 | 18 |
| 2026 | 6 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sanitary mask sheet21 Jul 2026US 12,685,352 B2Kao Corporation
- Ventilating and filtrating face mask5 May 2026US 12,616,857 B2NIKE, Inc.
- Oil purification filter5 May 2026US 12,616,925 B2Skf Recondoil AB
- Method of making a cartridge filter7 Apr 2026US 12,594,527 B2A. O. Smith Corporation
- Element of, cartridge and container with, filter for slurry10 Mar 2026US 12,569,790 B2Roki Techno Co., Ltd.
- Sanitary mask sheet17 Sep 2026US 2026/0272077 A1Kao Corporation
- Depth filter10 Sep 2026US 2026/0263976 A1Jnc Corporation
- Depth filter10 Sep 2026US 2026/0263977 A1Jnc Corporation
- Wire-wrapped screen3 Sep 2026US 2026/0257158 A1Msc Resources AB
- Filter media for filtration devices and methods of making and using the same3 Sep 2026US 2026/0257160 A13M Innovative Properties Company
Most cited
By later US patents
- Deformable well screen320US 5,901,789 AShell Oil Company · 1999
- Method of charging electret filter media289US 5,496,507 AMinnesota Mining and Manufacturing Company · 1996
- Method of making fibrous electrets241US 4,375,718 ASurgikos, Inc. · 1983
- Deformable well screen218US 6,012,522 AShell Oil Company · 2000
- Clean room air filtering135US 5,626,820 A1997