C07C 41/34
Separation
Official title: Separation; Purification; Stabilisation; Use of additives
C07C41/34 (Separation) appears on 639 US grants and 407 published applications in this corpus.
Search patents in C07C- Granted patents
- 639
- Published applications
- 407
- Assignees
- 316
- Inventors
- 1,549
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 5 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 12 | 0 |
| 1983 | 9 | 0 |
| 1984 | 18 | 0 |
| 1985 | 15 | 0 |
| 1986 | 5 | 0 |
| 1987 | 13 | 0 |
| 1988 | 8 | 0 |
| 1989 | 16 | 0 |
| 1990 | 15 | 0 |
| 1991 | 17 | 0 |
| 1992 | 20 | 0 |
| 1993 | 25 | 0 |
| 1994 | 25 | 0 |
| 1995 | 25 | 0 |
| 1996 | 20 | 0 |
| 1997 | 25 | 0 |
| 1998 | 24 | 0 |
| 1999 | 14 | 0 |
| 2000 | 20 | 0 |
| 2001 | 10 | 2 |
| 2002 | 18 | 10 |
| 2003 | 6 | 4 |
| 2004 | 2 | 22 |
| 2005 | 2 | 8 |
| 2006 | 14 | 10 |
| 2007 | 8 | 6 |
| 2008 | 3 | 13 |
| 2009 | 4 | 12 |
| 2010 | 6 | 13 |
| 2011 | 8 | 12 |
| 2012 | 5 | 18 |
| 2013 | 8 | 19 |
| 2014 | 20 | 14 |
| 2015 | 30 | 28 |
| 2016 | 22 | 32 |
| 2017 | 18 | 18 |
| 2018 | 22 | 14 |
| 2019 | 11 | 12 |
| 2020 | 13 | 18 |
| 2021 | 5 | 20 |
| 2022 | 16 | 22 |
| 2023 | 10 | 24 |
| 2024 | 10 | 25 |
| 2025 | 9 | 19 |
| 2026 | 10 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing composition containing purified fluorine-containing ether compound8 Sep 2026US 12,729,175 B2Daikin Industries, Ltd.
- Method for performing Mitsunobu reaction between alcoholic hydroxyl group donor and active hydrogen donor4 Aug 2026US 12,698,250 B2Jiangsu Hecheng Advanced Materials Co., Ltd.
- Method for the preparation of 1,2-propanediol, dipropylene glycol and tripropylene glycol7 Jul 2026US 12,673,912 B2Evonik Operations GmbH
- Production method for reduced coenzyme Q10 form-II type crystal or crystalline solid thereof5 May 2026US 12,617,744 B2Kaneka Corporation
- Process for the preparation of 2-isopentyl-2-isopropyl-1,3-dimethoxypropane28 Apr 2026US 12,612,349 B2Sabic Global Technologies B.V.
- Process for the preparation of ethylhexylglycerol27 Aug 2026US 2026/0250225 A1Symrise AG
- System and method for separation of non-ideal streams30 Jul 2026US 2026/0217635 A1Saudi Arabian Oil Company
- Methods of making and using 1-methyleffusol11 Jun 2026US 2026/0159465 A1
- Method for producing (poly)alkylene glycol monoalkyl ether4 Jun 2026US 2026/0152459 A1Nippon Shokubai Co., Ltd.
- Composition containing fluorine-containing monomer and fluoride ions, method for producing fluorine-containing monomer having reduced fluoride ion content, and method for purifying fluorine-containing monomer7 May 2026US 2026/0125355 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Catalytic distillation process146US 4,232,177 AChemical Research & Licensing Company · 1980
- Catalytic distillation process107US 4,307,254 AChemical Research & Licensing Company · 1981
- Hydrocarbon conversion by catalytic distillation68US 5,395,981 AUop LLC · 1995
- Catalytic distillation process65US 4,336,407 AChemical Research & Licensing Company · 1982
- Purification of polyols prepared using double metal cyanide complex catalysts65US 4,721,818 AAtlantic Richfield Company · 1988