B01D 39/20
Of inorganic material
Official title: of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material {C04B38/00} ; sintering metals C22C1/04; {making porous sintered metal bodies B22F3/10, honeycomb filters B01D46/2418, materials used for filtering exhaust gases of an internal combustion engine F01N3/022, ceramic honeycomb structures C04B38/0006})
B01D39/20 (Of inorganic material) appears on 2,272 US grants and 2,445 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,272
- Published applications
- 2,445
- Assignees
- 1,310
- Inventors
- 5,491
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 23 | 0 |
| 1978 | 26 | 0 |
| 1979 | 15 | 0 |
| 1980 | 14 | 0 |
| 1981 | 23 | 0 |
| 1982 | 21 | 0 |
| 1983 | 16 | 0 |
| 1984 | 20 | 0 |
| 1985 | 15 | 0 |
| 1986 | 16 | 0 |
| 1987 | 23 | 0 |
| 1988 | 25 | 0 |
| 1989 | 36 | 0 |
| 1990 | 27 | 0 |
| 1991 | 32 | 0 |
| 1992 | 46 | 0 |
| 1993 | 55 | 0 |
| 1994 | 28 | 0 |
| 1995 | 33 | 0 |
| 1996 | 28 | 0 |
| 1997 | 46 | 0 |
| 1998 | 63 | 0 |
| 1999 | 60 | 0 |
| 2000 | 34 | 0 |
| 2001 | 41 | 19 |
| 2002 | 44 | 55 |
| 2003 | 49 | 103 |
| 2004 | 54 | 99 |
| 2005 | 51 | 96 |
| 2006 | 50 | 102 |
| 2007 | 48 | 97 |
| 2008 | 45 | 80 |
| 2009 | 61 | 65 |
| 2010 | 43 | 78 |
| 2011 | 71 | 85 |
| 2012 | 53 | 66 |
| 2013 | 48 | 59 |
| 2014 | 42 | 78 |
| 2015 | 45 | 66 |
| 2016 | 51 | 71 |
| 2017 | 35 | 83 |
| 2018 | 50 | 99 |
| 2019 | 70 | 128 |
| 2020 | 82 | 100 |
| 2021 | 83 | 170 |
| 2022 | 64 | 174 |
| 2023 | 84 | 159 |
| 2024 | 96 | 139 |
| 2025 | 98 | 104 |
| 2026 | 76 | 70 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for adjusting grouting parameters in preparation of ceramic composite fiber-based catalytic filter tube, and method and device for preparing ceramic composite fiber-based catalytic filter tube6 Oct 2026US 12,752,223 B2Zhejiang Zhiyuan Environmental Technology Co., Ltd
- Food waste management system6 Oct 2026US 12,753,004 B2SharkNinja Operating LLC
- Substrate treatments29 Sep 2026US 12,746,490 B2Donaldson Company, Inc.
- Granulated hierarchical material structure29 Sep 2026US 12,746,527 B2Metalmark Innovations, PBC
- Microfluidic purification device29 Sep 2026US 12,746,548 B2Oriental System Technology Inc.
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Filtering device and reaction vessel and method for manufacturing aqueous slurry using the same8 Oct 2026US 2026/0306972 A1Umicore Battery Materials Finland Oy
- Filter system for the removal of volatile organosulfur compounds (voscs) from indoor air8 Oct 2026US 2026/0306980 A1Air Tech Group, SLU
- Honeycomb structure and honeycomb filter1 Oct 2026US 2026/0295525 A1NGK Insulators, Ltd.
- Methods of reducing the enzymatic hydrolysis activity rate in a composition obtained from a purification platform17 Sep 2026US 2026/0274889 A1Genentech, Inc.
Most cited
By later US patents
- Filter material construction and method335US 5,672,399 ADonaldson Company, Inc. · 1997
- Diesel particulate trap330US 4,329,162 ACorning Glass Works · 1982
- Process and composition for separating plasma or serum from whole blood317US 4,477,575 ABoehringer Mannheim GmbH · 1984
- Blood separation device comprising a filter and a capillary flow pathway exiting the filter254US 4,753,776 ABiotrack, Inc. · 1988
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998