B01D 29/52
In parallel connection
Official title: in parallel connection
B01D29/52 (In parallel connection) appears on 1,391 US grants and 969 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,391
- Published applications
- 969
- Assignees
- 777
- Inventors
- 2,576
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 22 | 0 |
| 1978 | 16 | 0 |
| 1979 | 9 | 0 |
| 1980 | 14 | 0 |
| 1981 | 33 | 0 |
| 1982 | 15 | 0 |
| 1983 | 11 | 0 |
| 1984 | 19 | 0 |
| 1985 | 26 | 0 |
| 1986 | 29 | 0 |
| 1987 | 32 | 0 |
| 1988 | 33 | 0 |
| 1989 | 31 | 0 |
| 1990 | 35 | 0 |
| 1991 | 31 | 0 |
| 1992 | 33 | 0 |
| 1993 | 28 | 0 |
| 1994 | 18 | 0 |
| 1995 | 29 | 0 |
| 1996 | 30 | 0 |
| 1997 | 31 | 0 |
| 1998 | 42 | 0 |
| 1999 | 36 | 0 |
| 2000 | 27 | 0 |
| 2001 | 40 | 7 |
| 2002 | 38 | 35 |
| 2003 | 31 | 21 |
| 2004 | 18 | 37 |
| 2005 | 15 | 36 |
| 2006 | 14 | 26 |
| 2007 | 16 | 40 |
| 2008 | 17 | 36 |
| 2009 | 18 | 26 |
| 2010 | 25 | 40 |
| 2011 | 20 | 31 |
| 2012 | 33 | 43 |
| 2013 | 21 | 43 |
| 2014 | 24 | 54 |
| 2015 | 23 | 56 |
| 2016 | 35 | 38 |
| 2017 | 31 | 34 |
| 2018 | 34 | 35 |
| 2019 | 42 | 45 |
| 2020 | 48 | 65 |
| 2021 | 40 | 60 |
| 2022 | 39 | 40 |
| 2023 | 44 | 39 |
| 2024 | 33 | 38 |
| 2025 | 24 | 29 |
| 2026 | 21 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Candle filter device6 Oct 2026US 12,752,222 B2Lenzing Aktiengesellschaft
- Point of use or point of dispense filter with multiple pleat packs15 Sep 2026US 12,734,488 B2Entegris, Inc.
- Rock straining system15 Sep 2026US 12,735,950 B2Proppant Express Solutions, LLC
- Plant and method for recycling and filtering rolling oil1 Sep 2026US 12,722,104 B2Fives Dms
- Retrofitting and use of rectangular filters, assembly and method for filtration25 Aug 2026US 12,714,957 B2Filtration Technology Corporation
- Filtration manifold with multiple ports8 Oct 2026US 2026/0309264 A1Midea Group Co., Ltd.
- Gas filter element, filter device and method of use1 Oct 2026US 2026/0295476 A1Pall Corporation
- Filtration device, filtration system, and filtration method20 Aug 2026US 2026/0241313 A1Hitachi High-Tech Corporation
- Water filtration device30 Jul 2026US 2026/0216623 A1LG Electronics Inc.
- Composite filter and water purifier including same4 Jun 2026US 2026/0152414 A1Coway Co., Ltd.
Most cited
By later US patents
- Deformable well screen320US 5,901,789 AShell Oil Company · 1999
- Deformable well screen218US 6,012,522 AShell Oil Company · 2000
- Multi-element cylindrical filter with equalized flow185US 6,511,599 B2Nelson Industries, Inc. · 2003
- Filter cartridge with a connector seal179US 4,609,465 APall Corporation · 1986
- Cross-flow filtration device with filtrate flow conduits and method of forming same150US 4,781,831 A1988