C07C 319/28
Separation
Official title: Separation; Purification
C07C319/28 (Separation) appears on 205 US grants and 172 published applications in this corpus.
Search patents in C07C- Granted patents
- 205
- Published applications
- 172
- Assignees
- 146
- Inventors
- 630
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 2 | 2 |
| 2003 | 3 | 2 |
| 2004 | 4 | 4 |
| 2005 | 0 | 6 |
| 2006 | 4 | 3 |
| 2007 | 4 | 3 |
| 2008 | 1 | 4 |
| 2009 | 3 | 4 |
| 2010 | 4 | 8 |
| 2011 | 0 | 5 |
| 2012 | 4 | 4 |
| 2013 | 2 | 5 |
| 2014 | 1 | 6 |
| 2015 | 13 | 9 |
| 2016 | 7 | 6 |
| 2017 | 6 | 4 |
| 2018 | 4 | 12 |
| 2019 | 10 | 7 |
| 2020 | 9 | 19 |
| 2021 | 12 | 18 |
| 2022 | 6 | 8 |
| 2023 | 5 | 11 |
| 2024 | 9 | 13 |
| 2025 | 5 | 4 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Processes for removing carbon disulfide from sulfide product streams16 Jun 2026US 12,655,097 B2Chevron Phillips Chemical Company LP
- D,L-methionine with an optimized particle size distribution16 Jun 2026US 12,655,098 B2Evonik Operations GmbH
- Method for producing thiol compound12 May 2026US 12,624,001 B2Resonac Corporation
- S-Methylmethionine-rich Brassica oleracea plant24 Feb 2026US 12,557,747 B2Sakata Seed Corporation
- Method for producing monosulfoxide derivative17 Feb 2026US 12,552,744 B2Kumiai Chemical Industry Co., Ltd.
- Apparatus and process for recovery of a valuable material13 Aug 2026US 2026/0233129 A1Evonik Operations GmbH
- Polythiol compositions and their process of preparation13 Aug 2026US 2026/0234103 A1Arkema France
- Method for preparing l-cysteine hydrochloride hydrate crystals of which particle size is controlled6 Aug 2026US 2026/0226002 A1Cj Cheiljedang Corporation
- Process for obtaining mixtures containing methionine and potassium hydrogencarbonate26 Mar 2026US 2026/0085038 A1Evonik Operations GmbH
- Processes for the Preparation of Alpha-Hydroxy Esters by Esterification of Alpha-Hydroxy Acids1 Jan 2026US 2026/0001837 A1Kemin Industries, Inc.
Most cited
By later US patents
- Stereoisomeric enrichment of 2-amino-3-hydroxy-3-phenylpropionic acids using d-threonine aldolase38US 5,346,828 ACelgene Corporation · 1994
- Liquid 2-hydroxy-4-methylthiobutyric acid and process for the preparation thereof31US 4,524,077 AMonsanto Company · 1985
- Oxidized disulfide oil solvent compositions28US 10,781,168 B2Saudi Arabian Oil Company · 2020
- Method of deodorizing a formulation containing at least one compound bearing a thiol group and deodorized formulation thus obtained20US 5,458,848 AL'oreal · 1995
- Oxidized disulfide oil solvent compositions19US 11,111,212 B2Saudi Arabian Oil Company · 2021