B01D 37/02
Precoating the filter medium
Official title: Precoating the filter medium; Addition of filter aids to the liquid being filtered {(devices for feeding reagents C02F1/685 and sub-groups; filter aids)}
B01D37/02 (Precoating the filter medium) appears on 566 US grants and 373 published applications in this corpus.
Search patents in B01D- Granted patents
- 566
- Published applications
- 373
- Assignees
- 366
- Inventors
- 1,077
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 12 | 0 |
| 1978 | 9 | 0 |
| 1979 | 14 | 0 |
| 1980 | 12 | 0 |
| 1981 | 21 | 0 |
| 1982 | 12 | 0 |
| 1983 | 11 | 0 |
| 1984 | 13 | 0 |
| 1985 | 17 | 0 |
| 1986 | 10 | 0 |
| 1987 | 13 | 0 |
| 1988 | 13 | 0 |
| 1989 | 6 | 0 |
| 1990 | 13 | 0 |
| 1991 | 9 | 0 |
| 1992 | 12 | 0 |
| 1993 | 12 | 0 |
| 1994 | 12 | 0 |
| 1995 | 11 | 0 |
| 1996 | 13 | 0 |
| 1997 | 13 | 0 |
| 1998 | 10 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 5 |
| 2002 | 11 | 15 |
| 2003 | 13 | 24 |
| 2004 | 9 | 16 |
| 2005 | 17 | 21 |
| 2006 | 16 | 9 |
| 2007 | 10 | 10 |
| 2008 | 7 | 17 |
| 2009 | 8 | 13 |
| 2010 | 4 | 8 |
| 2011 | 8 | 11 |
| 2012 | 6 | 11 |
| 2013 | 6 | 12 |
| 2014 | 12 | 22 |
| 2015 | 7 | 13 |
| 2016 | 7 | 12 |
| 2017 | 9 | 9 |
| 2018 | 11 | 19 |
| 2019 | 14 | 19 |
| 2020 | 13 | 16 |
| 2021 | 18 | 18 |
| 2022 | 8 | 23 |
| 2023 | 18 | 16 |
| 2024 | 13 | 18 |
| 2025 | 17 | 10 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sorbent coated hollow fiber filtration method using less spent sorbent flushing liquid12 May 2026US 12,623,170 B2Electrophor, Inc.
- Process for the removal of particulate matter from an aqueous stream14 Apr 2026US 12,599,858 B2Topsoe A/S
- Regenerative media filter20 Jan 2026US 12,528,034 B2Blue Skies Global LLC
- Mechanical demoisturizing of partially-decomposed organic material13 Jan 2026US 12,521,651 B2American Peat Technology, LLC
- Bioprocessing installation14 Oct 2025US 12,441,975 B2Sartorius Stedim Biotech GmbH
- Method of filtration of particulated systems with injection of nanobubbles, and, use8 Oct 2026US 2026/0306978 A1Universidade Federal Do Rio Grande Do Sul—Ufrgs
- Filtration aid compositions and methods of use30 Jul 2026US 2026/0217582 A1Locus Solutions Ipco, LLC
- Polymer impregnated amphoteric sorbent based adsorptive desalination and disinfection systems, components, and methods23 Jul 2026US 2026/0209086 A1The University of North Carolina at Greensboro
- Regenerative media filter21 May 2026US 2026/0138061 A1Blue Skies Global LLC
- Regenerative media filter21 May 2026US 2026/0138062 A1Blue Skies Global LLC
Most cited
By later US patents
- Nanofiber filter media194US 6,872,311 B2Koslow Technologies Corporation · 2005
- Fibrous structures containing immobilized particulate matter181US 5,486,410 AHoechst Celanese Corporation · 1996
- Personal water filter bottle system161US 6,569,329 B1Innova Pure Water Inc. · 2003
- Masking elements for dissolving oil improving body in an oil filter146US 4,075,098 AMonroe Auto Equipment Company · 1978
- Microporous filter media, filtration systems containing same, and methods of making and using143US 6,835,311 B2Koslow Technologies Corporation · 2004