C07C 303/44
Separation
Official title: Separation; Purification
C07C303/44 (Separation) appears on 252 US grants and 189 published applications in this corpus.
Search patents in C07C- Granted patents
- 252
- Published applications
- 189
- Assignees
- 161
- Inventors
- 630
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 13 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 1 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 6 | 3 |
| 2002 | 10 | 7 |
| 2003 | 4 | 6 |
| 2004 | 4 | 4 |
| 2005 | 4 | 9 |
| 2006 | 5 | 5 |
| 2007 | 3 | 0 |
| 2008 | 1 | 5 |
| 2009 | 0 | 4 |
| 2010 | 3 | 6 |
| 2011 | 2 | 5 |
| 2012 | 4 | 7 |
| 2013 | 6 | 5 |
| 2014 | 6 | 7 |
| 2015 | 10 | 6 |
| 2016 | 7 | 10 |
| 2017 | 12 | 3 |
| 2018 | 10 | 17 |
| 2019 | 8 | 15 |
| 2020 | 17 | 10 |
| 2021 | 10 | 10 |
| 2022 | 5 | 17 |
| 2023 | 12 | 10 |
| 2024 | 10 | 6 |
| 2025 | 7 | 11 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Amorphous substances, crystals, pharmaceutical compositions, preparation methods and uses of thiohydantoin compound or pharmaceutically acceptable salt thereof6 Oct 2026US 12,753,173 B2Suzhou Kintor Pharmaceuticals, Inc.
- Recovery of water-free methanesulfonic acid from the bottom stream of a distillation column26 May 2026US 12,637,419 B2BASF SE
- Method for reducing the concentration of SO3 in a reaction mixture comprising methane sulfonic acid and SO323 Dec 2025US 12,503,431 B2BASF SE
- Process for manufacturing alkanesulfonic acids25 Nov 2025US 12,479,795 B2BASF SE
- Crystalline form of 3-((L-valyl) amino)-1-propanesulfonic acid24 Jun 2025US 12,338,205 B2Risen (Suzhou) Pharma Tech Co., Ltd.
- Onium cation with ether linkages for zinc batteries20 Aug 2026US 2026/0245979 A1U.S. Government as represented by the Secretary of the Army
- Synthesis process for high purity isosulfan blue using flash chromatography in commercial plant scale28 Aug 2025US 2025/0270168 A1Rising Pharma Holdings, Inc.
- Skin external agent composition in which fine needle-like or columnar crystals of taurine are blended26 Jun 2025US 2025/0205185 A1Cosmed Pharmaceutical Co., Ltd.
- Methods of solvent displacement for metal-containing ionic liquids19 Jun 2025US 2025/0196021 A1Chevron Phillips Chemical Company LP
- Composition, system and method for removal of detergents from aqueous solutions5 Jun 2025US 2025/0177885 A1Dna Genotek Inc.
Most cited
By later US patents
- Mechanical force sensing semiconductor device69US 5,461,916 ANippondenso Co., Ltd. · 1995
- Mechanical force sensing semiconductor device63US 5,627,318 ANippondenso Co., Ltd. · 1997
- Semiconductor mechanical sensor55US 6,550,331 B2Denso Corporation · 2003
- Semiconductor mechanical sensor and method of manufacture41US 6,227,050 B1Nippondense Co., Ltd. · 2001
- Method for manufacturing a mechanical force sensing semiconductor device39US 5,872,024 ANippondenso Co., Ltd. · 1999