B01D 29/824
Using pistons
Official title: {using pistons}
B01D29/824 (Using pistons) appears on 36 US grants and 13 published applications in this corpus.
Search patents in B01D- Granted patents
- 36
- Published applications
- 13
- Assignees
- 23
- Inventors
- 64
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 3 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filtration device14 Apr 2026US 12,599,852 B2SSENG Co., Ltd.
- Separation device and method to separate contaminants from contaminated water19 Mar 2024US 11,931,677 B2Hydra Water AB
- Press assembly for plant-based milk22 Mar 2022US 11,278,825 B2ModernMilk Co.
- Dynamic separation and filtration18 May 2021US 11,007,742 B2Vwater Technologies, LLC.
- Collection jar and collection basket for surgical use9 Mar 2021US 10,940,247 B2Tobra Medical, Inc.
- Microplastic filter for a washing machine11 Jul 2024US 2024/0229338 A9
- Microplastic filter for a washing machine25 Apr 2024US 2024/0133111 A1
- Filtration device28 Dec 2023US 2023/0415075 A1SSENG Co., Ltd.
- Separation device and method to separate contaminants from contaminated water5 Aug 2021US 2021/0236965 A1Mellegard & Naij AB
- Dynamic separation and filtration27 Aug 2020US 2020/0269170 A1Vwater Technologies, LLC.
Most cited
By later US patents
- Continuous filter with pressing means26US 4,019,984 AGesellschaft fur Strahlen- und Umweltforschung mbH · 1977
- Press assembly for extracting liquids from solids26US 5,275,097 A1994
- Process for dewatering fine granular materials25US 4,420,404 ADravo Corporation · 1983
- Filter bag assembly25US 5,267,509 A1993
- Method and apparatus for extracting liquid from a liquid-containing slurry24US 6,123,018 A2000