C07F 7/20
Purification, separation
C07F7/20 (Purification, separation) appears on 174 US grants and 102 published applications in this corpus.
Search patents in C07F- Granted patents
- 174
- Published applications
- 102
- Assignees
- 77
- Inventors
- 410
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 2 |
| 2003 | 1 | 6 |
| 2004 | 2 | 5 |
| 2005 | 4 | 4 |
| 2006 | 3 | 3 |
| 2007 | 3 | 5 |
| 2008 | 7 | 6 |
| 2009 | 1 | 3 |
| 2010 | 3 | 2 |
| 2011 | 1 | 5 |
| 2012 | 2 | 3 |
| 2013 | 4 | 3 |
| 2014 | 2 | 3 |
| 2015 | 7 | 8 |
| 2016 | 3 | 1 |
| 2017 | 1 | 4 |
| 2018 | 2 | 9 |
| 2019 | 6 | 4 |
| 2020 | 9 | 3 |
| 2021 | 4 | 5 |
| 2022 | 3 | 2 |
| 2023 | 2 | 6 |
| 2024 | 5 | 3 |
| 2025 | 4 | 5 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing organic silicon compound having ketimine structure19 May 2026US 12,630,569 B2Shin-Etsu Chemical Co., Ltd.
- Method for producing polysulphane-silanes by means of phase transfer catalysis14 Apr 2026US 12,600,735 B2Evonik Operations GmbH
- Method for purifying organic compound and method for producing organic compound3 Feb 2026US 12,540,147 B2Tokuyama Corporation
- Fluid for accommodating intraocular lenses23 Sep 2025US 12,419,738 B2Alcon Inc.
- Process for removing an impurity from a chlorosilane mixture19 Aug 2025US 12,391,559 B2Wacker Chemie AG
- Process and catalyst composition for preparing organosilicon compounds via isomerization of internal olefins and hydrosilylation6 Aug 2026US 2026/0226081 A1Dow Silicones Corporation
- Fluid for accommodating intraocular lenses25 Dec 2025US 2025/0387219 A1Alcon Inc.
- Silicone purification and deodorization process from washing cosmetic manufacturing lines13 Nov 2025US 2025/0346722 A1Especialidades QuíMicas Globales De MéXico, S.A.P.I. De C.V.
- Method for purifying a siloxane containing a hydroxyl and (meth)acrylic groups, and a composition comprising the siloxane18 Sep 2025US 2025/0289835 A1Shin-Etsu Chemical Co., Ltd.
- Method for manufacturing drometrizole trisiloxane (dmts)4 Sep 2025US 2025/0276987 A1Serasoo Co., Ltd
Most cited
By later US patents
- Fluid for accommodating intraocular lenses99US 8,900,298 B2PowerVision, Inc. · 2014
- Vitreoretinal silicone tamponades made by supercritical fluid extraction67US 7,276,619 B2Bausch & Lomb Incorporated · 2007
- Process for stabilization of dry cleaning solutions63US 6,368,359 B1General Electric Company · 2002
- Separation of chlorosilanes by extractive distillation51US 4,411,740 ADow Corning Corporation · 1983
- Process for preparing amino-functional organosilanes low in or free of chloro-functional organosilanes26US 5,698,726 AHuels Aktiengesellschaft · 1997