B01D 29/31
Self-supporting filtering elements
B01D29/31 (Self-supporting filtering elements) appears on 793 US grants and 742 published applications in this corpus.
Search patents in B01D- Granted patents
- 793
- Published applications
- 742
- Assignees
- 536
- Inventors
- 1,717
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 11 | 0 |
| 1989 | 18 | 0 |
| 1990 | 22 | 0 |
| 1991 | 17 | 0 |
| 1992 | 10 | 0 |
| 1993 | 18 | 0 |
| 1994 | 10 | 0 |
| 1995 | 19 | 0 |
| 1996 | 20 | 0 |
| 1997 | 16 | 0 |
| 1998 | 17 | 0 |
| 1999 | 16 | 0 |
| 2000 | 6 | 0 |
| 2001 | 18 | 4 |
| 2002 | 17 | 13 |
| 2003 | 10 | 9 |
| 2004 | 5 | 19 |
| 2005 | 6 | 13 |
| 2006 | 7 | 8 |
| 2007 | 9 | 10 |
| 2008 | 5 | 9 |
| 2009 | 6 | 8 |
| 2010 | 4 | 12 |
| 2011 | 4 | 12 |
| 2012 | 11 | 18 |
| 2013 | 8 | 20 |
| 2014 | 14 | 9 |
| 2015 | 12 | 22 |
| 2016 | 8 | 31 |
| 2017 | 12 | 38 |
| 2018 | 20 | 41 |
| 2019 | 38 | 68 |
| 2020 | 53 | 66 |
| 2021 | 38 | 72 |
| 2022 | 43 | 62 |
| 2023 | 55 | 49 |
| 2024 | 51 | 58 |
| 2025 | 47 | 48 |
| 2026 | 24 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pool skimmer6 Oct 2026US 12,753,619 B1Sichuan Cootway Technology Co., Ltd.
- Automatic swimming pool cleaners especially adept at climbing and cleaning pool stairs29 Sep 2026US 12,747,605 B2Zodiac Pool Systems LLC
- Rock straining system15 Sep 2026US 12,735,950 B2Proppant Express Solutions, LLC
- Surface cleaning apparatus8 Sep 2026US 12,727,731 B2Omachron Intellectual Property Inc.
- Pool skimmer1 Sep 2026US 12,723,423 B1Sichuan Cootway Technology Co., Ltd.
- Surface cleaning apparatus24 Sep 2026US 2026/0283435 A1Omachron Intellectual Property Inc.
- Lye outlet within a lye filter24 Sep 2026US 2026/0284562 A1John Cockerill Hydrogen Belgium
- Apparatus for efficient cleaning of roller brushes without high-pressure water sources10 Sep 2026US 2026/0262824 A1
- Impeller for laundry appliance that incorporates a filtering cap for separating particulate matter from wash fluid within the appliance10 Sep 2026US 2026/0265987 A1Whirlpool Corporation
- Filter cartridge27 Aug 2026US 2026/0250158 A1Gopala AG
Most cited
By later US patents
- Filter element and manufacture method thereof141US 5,049,326 ANippondenso Co., Ltd. · 1991
- Method for producing ceramic honeycomb filters127US 4,293,357 ANGK Insulators, Ltd. · 1981
- Molten metal filter cartridge115US 5,741,422 AMetaullics Systems Co., L.P. · 1998
- Filter element and manufacture method thereof95US 5,002,666 ANippondenso Co., Ltd. · 1991
- Stormwater inlet filter88US 5,232,587 A1993