B01D 21/34
Controlling the feed distribution
Official title: Controlling the feed distribution; Controlling the liquid level {; Control of process parameters}
B01D21/34 (Controlling the feed distribution) appears on 705 US grants and 475 published applications in this corpus.
Search patents in B01D- Granted patents
- 705
- Published applications
- 475
- Assignees
- 428
- Inventors
- 1,177
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 16 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 9 | 0 |
| 1986 | 6 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 9 | 0 |
| 1991 | 15 | 0 |
| 1992 | 16 | 0 |
| 1993 | 12 | 0 |
| 1994 | 20 | 0 |
| 1995 | 11 | 0 |
| 1996 | 17 | 0 |
| 1997 | 28 | 0 |
| 1998 | 29 | 0 |
| 1999 | 20 | 0 |
| 2000 | 25 | 0 |
| 2001 | 14 | 6 |
| 2002 | 12 | 16 |
| 2003 | 22 | 19 |
| 2004 | 15 | 21 |
| 2005 | 17 | 22 |
| 2006 | 17 | 12 |
| 2007 | 17 | 20 |
| 2008 | 7 | 7 |
| 2009 | 12 | 15 |
| 2010 | 2 | 14 |
| 2011 | 9 | 20 |
| 2012 | 15 | 23 |
| 2013 | 18 | 22 |
| 2014 | 15 | 24 |
| 2015 | 18 | 23 |
| 2016 | 10 | 26 |
| 2017 | 21 | 27 |
| 2018 | 22 | 18 |
| 2019 | 17 | 18 |
| 2020 | 17 | 29 |
| 2021 | 21 | 18 |
| 2022 | 24 | 21 |
| 2023 | 22 | 24 |
| 2024 | 10 | 10 |
| 2025 | 7 | 11 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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