B01D 21/307
Passive control mechanisms without external energy
Official title: {Passive control mechanisms without external energy, e.g. using a float}
B01D21/307 (Passive control mechanisms without external energy) appears on 94 US grants and 93 published applications in this corpus.
Search patents in B01D- Granted patents
- 94
- Published applications
- 93
- Assignees
- 67
- Inventors
- 149
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 3 |
| 2006 | 2 | 2 |
| 2007 | 1 | 2 |
| 2008 | 2 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 5 |
| 2012 | 1 | 8 |
| 2013 | 10 | 6 |
| 2014 | 1 | 7 |
| 2015 | 2 | 8 |
| 2016 | 3 | 8 |
| 2017 | 6 | 3 |
| 2018 | 7 | 4 |
| 2019 | 7 | 6 |
| 2020 | 2 | 7 |
| 2021 | 10 | 3 |
| 2022 | 5 | 4 |
| 2023 | 5 | 5 |
| 2024 | 3 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Floating liquid intake31 Mar 2026US 12,589,335 B2Turret IP Pty Ltd
- Settler with a settler plate that includes a hollow support18 Mar 2025US 12,251,648 B2Meurer Research, Inc.
- Fractionator annular drain apparatus and method14 May 2024US 11,980,834 B2
- Fluid removal system for a blowdown vessel27 Feb 2024US 11,911,716 B2Enercorp Engineered Solutions Inc.
- System and method for producing interleukin receptor antagonist (IRA)20 Feb 2024US 11,905,311 B2Estar Technologies Ltd
- Plate assembly and method of manufacturing for use in water treatment6 Aug 2026US 2026/0225004 A1Jim Myers & Sons, Inc.
- Fluid removal device5 Feb 2026US 2026/0034480 A1Civ-Con Products & Solutions LLC
- Fractionator annular drain apparatus and method30 Jan 2025US 2025/0032957 A1Snorkels IP, LLC
- Processing discharge liquid filtration device3 Oct 2024US 2024/0326191 A1Tokyo Seimitsu Co., Ltd.
- Plate assembly and method of manufacturing for use in water treatment11 Jan 2024US 2024/0009596 A1Jim Myers & Sons, Inc.
Most cited
By later US patents
- Lateral flow coalescing multiphase plate separator50US 5,242,604 ASudden Service Co. · 1993
- Stormwater treatment apparatus45US 6,638,424 B2Jensen Enterprises, Inc. · 2003
- Method and apparatus for separating biological materials41US 9,011,800 B2Biomet Biologics, LLC · 2015
- Apparatus and method for separating and concentrating fluids containing multiple components37US 8,567,609 B2Biomet Biologics, LLC · 2013
- Apparatus and method for separating and isolating components of a biological fluid33US 8,177,072 B2ThermoGenesis Corp. · 2012