B01D 24/26
Upward filtration
B01D24/26 (Upward filtration) appears on 49 US grants and 13 published applications in this corpus.
Search patents in B01D- Granted patents
- 49
- Published applications
- 13
- Assignees
- 33
- Inventors
- 74
- Latest grant
- 13 Aug 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 6 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 3 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
| 2018 | 2 | 2 |
| 2019 | 3 | 0 |
| 2020 | 3 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Apparatus and method to prevent downward flow of liquid during a gas only washing cycle13 Aug 2024US 12,059,637 B2Roberts Marketing DE, Inc.
- Filter agitator24 May 2022US 11,338,225 B2The Tru Shrimp Companies, Inc.
- Water filtration device and method for re-circulating filtered water in decorative waterways3 Nov 2020US 10,822,248 B1
- Apparatus and method for purification of a fluid by means of a filter bed8 Sep 2020US 10,765,972 B2Paques I.P. B.V.
- Method and apparatus for filtering contaminated water9 Jun 2020US 10,675,565 B1
- Apparatus and method to prevent downward flow of liquid during a gas only washing cycle16 Feb 2023US 2023/0053228 A1Roberts Marketing DE, Inc.
- Filter agitator11 Mar 2021US 2021/0069616 A1The Tru Shrimp Company
- Apparatus and method for purification of a fluid by means of a filter bed21 Jun 2018US 2018/0169546 A1Paques I.P. B.V.
- Apparatus and Method for Removing Impurities from Water or Wastewater5 Apr 2018US 2018/0093231 A1Roberts Marketing DE, Inc.
- Combined device for sewage deep treatment and treatment method22 Sep 2016US 2016/0272508 A1Mississippi International Water (China) Inc.
Most cited
By later US patents
- Water filtration process and apparatus having upflow filter with buoyant filter media and downflow filter with nonbuoyant filter media70US 4,547,286 ANeptune Microfloc, Inc. · 1985
- Method and apparatus for separating suspended solids from liquids47US 4,743,382 AState of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University · 1988
- Ornamental pond skimmer and filter apparatus45US 6,461,501 B1Hardscape Materials, Inc. · 2002
- Method and apparatus for water treatment40US 5,766,488 AUnited States Filter Corporation · 1998
- High speed upward flow filtration apparatus36US 5,248,415 AMitsuimiikekakouki Kabushiki Kaisha · 1993