B01D 3/163
Plates with valves
Official title: {Plates with valves}
B01D3/163 (Plates with valves) appears on 74 US grants and 63 published applications in this corpus.
Search patents in B01D- Granted patents
- 74
- Published applications
- 63
- Assignees
- 38
- Inventors
- 136
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 3 | 5 |
| 2010 | 0 | 2 |
| 2011 | 2 | 2 |
| 2012 | 3 | 2 |
| 2013 | 3 | 2 |
| 2014 | 2 | 4 |
| 2015 | 3 | 1 |
| 2016 | 3 | 6 |
| 2017 | 1 | 5 |
| 2018 | 6 | 5 |
| 2019 | 6 | 8 |
| 2020 | 4 | 1 |
| 2021 | 3 | 5 |
| 2022 | 3 | 2 |
| 2023 | 4 | 1 |
| 2024 | 4 | 3 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Production system, production method and application of general-purpose high-purity chemicals3 Feb 2026US 12,539,471 B2Beijing University of Chemical Technology
- Fractionation tray with adjustable open area for cleaning and/or throughput control3 Dec 2024US 12,157,076 B2Crown Iron Works Company
- Method and system for orifice control of valve pressure drop13 Aug 2024US 12,059,640 B2Sulzer Management AG
- Method and system for orifice control of valve pressure drop16 Apr 2024US 11,958,001 B2Sulzer Management AG
- Multi-bubbling region column tray and corresponding plate column26 Mar 2024US 11,938,425 B2Beijing Zehua Chemical Engineering Co., Ltd.
- Mass transfer tray, use thereof, column having the same, and thermal separation process12 Jun 2025US 2025/0186902 A1BASF SE
- Fractionation tray with adjustable open area for cleaning and/or throughput control20 Mar 2025US 2025/0090974 A1Crown Iron Works Company
- Dual-flow tray for vapor-liquid contacting, and its use11 Jul 2024US 2024/0226768 A9Distillation Equipment Company Ltd
- Dual-flow tray for vapor-liquid contacting, and its use25 Apr 2024US 2024/0131447 A1Distillation Equipment Company Ltd
- Production system, production method and application of general-purpose high-purity chemicals8 Feb 2024US 2024/0042343 A1Beijing University of Chemical Technology
Most cited
By later US patents
- Production of carboxylic acid ester by esterification and apparatus thereof79US 5,536,856 ADavy Process Technology Limited · 1996
- Method and apparatus for improving a fractionation process34US 6,799,752 B2AMT International, Inc. · 2004
- Mass transfer device32US 5,911,922 ANorton Chemical Process Products Corporation · 1999
- Mass transfer device25US 5,762,834 A1998
- Contact tray for a mass transfer column24US 8,720,870 B2Sulzer Chemtech AG · 2014