B01D 3/225
Dual-flow sieve trays
Official title: {Dual-flow sieve trays}
B01D3/225 (Dual-flow sieve trays) appears on 61 US grants and 59 published applications in this corpus.
Search patents in B01D- Granted patents
- 61
- Published applications
- 59
- Assignees
- 27
- Inventors
- 131
- Latest grant
- 26 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 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 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 4 |
| 2002 | 5 | 3 |
| 2003 | 1 | 2 |
| 2004 | 3 | 6 |
| 2005 | 3 | 5 |
| 2006 | 1 | 1 |
| 2007 | 5 | 2 |
| 2008 | 3 | 0 |
| 2009 | 3 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 3 | 7 |
| 2016 | 3 | 1 |
| 2017 | 2 | 4 |
| 2018 | 2 | 1 |
| 2019 | 5 | 5 |
| 2020 | 1 | 3 |
| 2021 | 4 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 2 |
| 2025 | 0 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-bubbling region column tray and corresponding plate column26 Mar 2024US 11,938,425 B2Beijing Zehua Chemical Engineering Co., Ltd.
- Multi-bubbling region column tray and corresponding plate column10 Jan 2023US 11,547,952 B1Beijing Zehua Chemical Engineering Co., Ltd.
- Multi-pass contact tray for a mass transfer column and method involving same23 Aug 2022US 11,420,135 B2Koch-Glitsch, LP
- Multiple downcomer trays19 Oct 2021US 11,148,069 B2Uop LLC
- Multiple pass, parallel flow downcomer tray for a mass transfer column27 Apr 2021US 10,989,471 B2Praxair Technology, Inc.
- Reactive monomer separation device26 Mar 2026US 2026/0084075 A1LG Chem.Ltd.
- Reactive monomer separation device26 Mar 2026US 2026/0084076 A1LG Chem.Ltd.
- Liquid-liquid extraction column with variable inter-tray space20 Feb 2025US 2025/0058248 A1Ifp Energies Nouvelles
- Variable perforation liquid-liquid extraction column20 Feb 2025US 2025/0058249 A1Ifp Energies Nouvelles
- Dual-flow tray for vapor-liquid contacting, and its use11 Jul 2024US 2024/0226768 A9Distillation Equipment Company Ltd
Most cited
By later US patents
- Method of distilling vinyl compounds34US 3,988,213 ANippon Shokubai Kagaku Kogyo Co., Ltd. · 1976
- Method for producing acrylic acid32US 6,498,272 B1BASF SE · 2002
- Fractionation tray with side discharging triangular downcomers30US 5,407,605 AUop LLC · 1995
- Fractionation tray having packing immediately below tray deck28US 5,262,094 AUop LLC · 1993
- Systems including a condensing apparatus such as a bubble column condenser28US 9,079,117 B2Gradiant Corporation · 2015