B01D 21/30
Control equipment
B01D21/30 (Control equipment) appears on 1,028 US grants and 785 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,028
- Published applications
- 785
- Assignees
- 628
- Inventors
- 1,811
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 9 | 0 |
| 1978 | 9 | 0 |
| 1979 | 17 | 0 |
| 1980 | 11 | 0 |
| 1981 | 8 | 0 |
| 1982 | 7 | 0 |
| 1983 | 9 | 0 |
| 1984 | 5 | 0 |
| 1985 | 11 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 10 | 0 |
| 1991 | 20 | 0 |
| 1992 | 18 | 0 |
| 1993 | 19 | 0 |
| 1994 | 23 | 0 |
| 1995 | 15 | 0 |
| 1996 | 26 | 0 |
| 1997 | 34 | 0 |
| 1998 | 37 | 0 |
| 1999 | 25 | 0 |
| 2000 | 29 | 0 |
| 2001 | 19 | 7 |
| 2002 | 16 | 23 |
| 2003 | 28 | 22 |
| 2004 | 21 | 26 |
| 2005 | 19 | 24 |
| 2006 | 20 | 16 |
| 2007 | 20 | 22 |
| 2008 | 8 | 10 |
| 2009 | 14 | 17 |
| 2010 | 4 | 20 |
| 2011 | 12 | 28 |
| 2012 | 16 | 34 |
| 2013 | 26 | 34 |
| 2014 | 21 | 35 |
| 2015 | 24 | 39 |
| 2016 | 19 | 39 |
| 2017 | 36 | 42 |
| 2018 | 37 | 45 |
| 2019 | 36 | 37 |
| 2020 | 41 | 61 |
| 2021 | 45 | 44 |
| 2022 | 49 | 47 |
| 2023 | 44 | 40 |
| 2024 | 24 | 26 |
| 2025 | 20 | 20 |
| 2026 | 20 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Fluidic device and method for controlling fluidic device18 Aug 2026US 12,708,866 B2Seiko Epson Corporation
- Measuring and controlling organic matter in waste water stream18 Aug 2026US 12,709,561 B2Kemira Oyj
- Device and method for treating green liquor11 Aug 2026US 12,703,943 B2Valmet Corporation
- System for removing solids from a separator and method therefor28 Jul 2026US 12,691,392 B2Expro North Sea Limited
- Method and system for controlling purification process through color value monitoring, and method for producing polyhydroxyalkanoate resin1 Oct 2026US 2026/0297244 A1Cj Cheiljedang Corporation
- Plasma separation apparatus and plasma separation method24 Sep 2026US 2026/0284556 A1Canon Medical Systems Corporation
- System and method of plasma collection20 Aug 2026US 2026/0241090 A1Fenwal, Inc.
- Automated skimmer system13 Aug 2026US 2026/0233128 A1
- Separation of fluids containing solids13 Aug 2026US 2026/0233236 A1World Water Works, Inc.
Most cited
By later US patents
- Enhanced yield platelet collection systems and methods216US 5,370,802 ABaxter International Inc. · 1994
- Particle handling method by acoustic radiation force and apparatus therefore207US 5,902,489 AHitachi, Ltd. · 1999
- Centrifugation pheresis system202US 4,834,890 ABaxter International Inc. · 1989
- Time based interface detection systems for blood processing apparatus186US 5,316,667 ABaxter International Inc. · 1994
- Centrifugation system having an interface detection surface161US 5,322,620 ABaxter International Inc. · 1994