B01D 35/301
Constructions of two or more housings
Official title: {Constructions of two or more housings (B01D35/12 takes precedence)}
B01D35/301 (Constructions of two or more housings) appears on 255 US grants and 254 published applications in this corpus.
Search patents in B01D- Granted patents
- 255
- Published applications
- 254
- Assignees
- 162
- Inventors
- 547
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 6 |
| 2003 | 2 | 11 |
| 2004 | 2 | 10 |
| 2005 | 7 | 10 |
| 2006 | 4 | 9 |
| 2007 | 8 | 8 |
| 2008 | 5 | 12 |
| 2009 | 4 | 4 |
| 2010 | 8 | 13 |
| 2011 | 11 | 6 |
| 2012 | 2 | 6 |
| 2013 | 6 | 3 |
| 2014 | 7 | 14 |
| 2015 | 0 | 14 |
| 2016 | 9 | 4 |
| 2017 | 4 | 5 |
| 2018 | 15 | 16 |
| 2019 | 11 | 23 |
| 2020 | 11 | 17 |
| 2021 | 20 | 13 |
| 2022 | 11 | 17 |
| 2023 | 18 | 8 |
| 2024 | 12 | 7 |
| 2025 | 8 | 13 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pure water systems25 Aug 2026US 12,715,790 B2Unger Marketing International, LLC
- Water purifying filter assembly19 May 2026US 12,629,616 B2Samsung Electronics Co., Ltd.
- Modular device for fixedly arranging and interconnecting individual separation units and/or function units amongst one another12 May 2026US 12,623,168 B2Sartorius Stedim Biotech GmbH
- Single-use device for the separation or filtering of a large volume of a mixture of substances5 May 2026US 12,616,920 B2Sartorius Stedim Biotech GmbH
- Modular filtration platform4 Nov 2025US 12,458,914 B2Ecowater Systems, Inc.
- Filter Apparatus17 Sep 2026US 2026/0273443 A1Hydac Filter Systems GmbH
- Modular system for filter containers10 Sep 2026US 2026/0263975 A1
- Under-sink water purifier30 Jul 2026US 2026/0217566 A1Coway Co., Ltd.
- Modular filter core19 Mar 2026US 2026/0077283 A1Sonoco Development, Inc.
- Water filter with replaceable active components5 Mar 2026US 2026/0061343 A1Blu Technology LLC
Most cited
By later US patents
- Quick-change filter cartridge and head therefor175US 4,735,716 ACuno Corporated · 1988
- Stackable filter head unit130US 4,192,750 AMassey-Ferguson Inc. · 1980
- Quick-change filter cartridge and head therefor130US 4,877,521 ACuno Incorporated · 1989
- Modular microporous filter assemblies111US 5,405,528 AMemtec Limited · 1995
- Liquid filtration system and replaceable filter cartridge usable therewith105US 6,051,144 AClack Corporation · 2000