B01D 21/302
Active control mechanisms with external energy
Official title: {Active control mechanisms with external energy, e.g. with solenoid valve}
B01D21/302 (Active control mechanisms with external energy) appears on 187 US grants and 141 published applications in this corpus.
Search patents in B01D- Granted patents
- 187
- Published applications
- 141
- Assignees
- 133
- Inventors
- 376
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 0 |
| 2002 | 6 | 5 |
| 2003 | 4 | 4 |
| 2004 | 7 | 4 |
| 2005 | 4 | 5 |
| 2006 | 0 | 1 |
| 2007 | 3 | 3 |
| 2008 | 0 | 3 |
| 2009 | 4 | 5 |
| 2010 | 0 | 1 |
| 2011 | 2 | 1 |
| 2012 | 2 | 4 |
| 2013 | 2 | 2 |
| 2014 | 4 | 2 |
| 2015 | 4 | 2 |
| 2016 | 3 | 12 |
| 2017 | 4 | 8 |
| 2018 | 4 | 6 |
| 2019 | 7 | 10 |
| 2020 | 10 | 13 |
| 2021 | 10 | 11 |
| 2022 | 12 | 10 |
| 2023 | 10 | 9 |
| 2024 | 4 | 4 |
| 2025 | 2 | 8 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for treating a wastewater effluent in a sequencing batch reactor (SBR) having a constant level and controlled recovery25 Aug 2026US 12,715,799 B2Suez International
- System for removing solids from a separator and method therefor28 Jul 2026US 12,691,392 B2Expro North Sea Limited
- Waste oil handling apparatus26 May 2026US 12,636,596 B2
- Shaker fluid level automatic control7 Apr 2026US 12,594,512 B2National Oilwell Varco, L. P.
- Automated skimmer system31 Mar 2026US 12,589,334 B2
- Plasma separation apparatus and plasma separation method24 Sep 2026US 2026/0284556 A1Canon Medical Systems Corporation
- Automated skimmer system13 Aug 2026US 2026/0233128 A1
- Mud handling auger system6 Aug 2026US 2026/0225005 A1ESD Waste2Water, Inc.
- Method and system for treating fluid30 Jul 2026US 2026/0216738 A1Vortex Corporation
- Substrate processing apparatus and substrate processing method25 Jun 2026US 2026/0175144 A1Semes Co., Ltd.
Most cited
By later US patents
- Blood processing systems and methods with sensors to detect contamination due to presence of cellular components or dilution due to presence of plasma158US 6,348,156 B1Baxter International Inc. · 2002
- Swimming pool control system134US 5,730,861 A1998
- System and methods for harvesting mononuclear cells by recirculation of packed red blood cells128US 5,980,760 ABaxter International Inc. · 1999
- Systems and methods for on line collecting and resuspending cellular-rich blood products like platelet concentrate121US 5,427,695 ABaxter International Inc. · 1995
- Apparatus and method for blood separation116US 5,964,724 AMedtronic Electromedics, Inc. · 1999