B01D 3/4205
Reflux ratio control splitter
Official title: {Reflux ratio control splitter}
B01D3/4205 (Reflux ratio control splitter) appears on 59 US grants and 51 published applications in this corpus.
Search patents in B01D- Granted patents
- 59
- Published applications
- 51
- Assignees
- 48
- Inventors
- 163
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 2 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 3 |
| 2015 | 1 | 0 |
| 2016 | 3 | 5 |
| 2017 | 5 | 4 |
| 2018 | 1 | 3 |
| 2019 | 4 | 3 |
| 2020 | 3 | 5 |
| 2021 | 4 | 3 |
| 2022 | 5 | 2 |
| 2023 | 2 | 10 |
| 2024 | 2 | 2 |
| 2025 | 4 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Recovering mono-ethylene glycol8 Sep 2026US 12,729,173 B2Changchun Meihe Science and Technology Development Co., Ltd.
- Method for producing 1,3-butylene glycol, and 1,3-butylene glycol product25 Nov 2025US 12,478,568 B2Daicel Corporation
- Method for producing 1,3-butylene glycol, and 1,3-butylene glycol product18 Nov 2025US 12,472,133 B2Daicel Corporation
- Method for manufacturing 1,3-butylene glycol, and 1,3-butylene glycol product18 Nov 2025US 12,472,134 B2Daicel Corporation
- Method for preparing synthesis gas15 Jul 2025US 12,358,790 B2LG Chem.Ltd.
- Methods for purifying tin compound14 May 2026US 2026/0132156 A1Gelest, Inc.
- Methods for purifying tin compounds5 Jun 2025US 2025/0179101 A1Gelest, Inc.
- Process and apparatus for recovering liquid products from a pyrolysis stream19 Sep 2024US 2024/0309275 A1Braskem S/A
- Recovering Mono-ethylene Glycol6 Jun 2024US 2024/0182391 A1Upm-Kymmene Corporation
- 1,3-butylene glycol product26 Oct 2023US 2023/0338248 A1Daicel Corporation
Most cited
By later US patents
- Volatiles separator and concentrator36US 5,458,739 AVendome Copper & Brass Works, Inc. · 1995
- Volatiles separator and concentrator19US 5,624,534 A1997
- Low temperature vacuum distillation and concentration process13US 5,955,135 AVendome Copper & Brass Works, Inc. · 1999
- Process and device for regenerating a contaminated solvent13US 6,117,275 ADidda Maria Janina Baumann · 2000
- Temperature-gradient type multistage condenser11US 5,885,313 AShionogi & Co., Ltd. · 1999