C07C 227/38
Separation
Official title: Separation; Purification; Stabilisation; Use of additives (separation of optical isomers C07C227/34)
C07C227/38 (Separation) appears on 340 US grants and 343 published applications in this corpus.
Search patents in C07C- Granted patents
- 340
- Published applications
- 343
- Assignees
- 255
- Inventors
- 1,105
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 0 |
| 2002 | 7 | 11 |
| 2003 | 5 | 14 |
| 2004 | 11 | 18 |
| 2005 | 7 | 12 |
| 2006 | 10 | 11 |
| 2007 | 6 | 8 |
| 2008 | 11 | 4 |
| 2009 | 4 | 10 |
| 2010 | 5 | 13 |
| 2011 | 3 | 16 |
| 2012 | 7 | 14 |
| 2013 | 11 | 9 |
| 2014 | 14 | 20 |
| 2015 | 10 | 17 |
| 2016 | 21 | 17 |
| 2017 | 16 | 15 |
| 2018 | 13 | 14 |
| 2019 | 15 | 15 |
| 2020 | 13 | 17 |
| 2021 | 16 | 13 |
| 2022 | 6 | 8 |
| 2023 | 4 | 15 |
| 2024 | 2 | 22 |
| 2025 | 5 | 15 |
| 2026 | 8 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for preparing solriamfetol hydrochloride1 Sep 2026US 12,723,020 B2Procos S.P.A.
- Process for isolating 2-(4'-diethylamino-2'-hydroxybenzoyl)benzoic acid hexyl ester25 Aug 2026US 12,715,837 B2BASF SE
- Method of producing carboxylic acid18 Aug 2026US 12,709,763 B2Toray Industries, Inc.
- Method of forming a chelating composition28 Jul 2026US 12,692,222 B2Nouryon Chemicals International B. V.
- Crystalline form of L-serine and process of preparing same21 Apr 2026US 12,606,518 B2Astrogen, Inc.
- Method for obtaining organic acids from an aqueous mother liquor10 Sep 2026US 2026/0265175 A1Covestro Deutschland AG
- Method for obtaining crystalline diethylamino hydroxybenzoyl hexyl benzoate27 Aug 2026US 2026/0250238 A1BASF SE
- Renewably derived polyamides and methods of making the same13 Aug 2026US 2026/0234328 A1Wilmar Trading Pte. Ltd.
- Process for manufacturing solid particles comprising at least one aminocarboxylate complexing agent13 Aug 2026US 2026/0234515 A1BASF SE
- Method for producing tryptophan decomposition product, method for producing formylkynurenine, method for producing kynurenine, method for producing tryptophan radical-containing aqueous solution, and bactericidal aqueous solution6 Aug 2026US 2026/0223845 A1Meijo University
Most cited
By later US patents
- Lipid formulation340US 8,158,601 B2Alnylam Pharmaceuticals, Inc. · 2012
- Lipid formulation126US 8,802,644 B2Tekmira Pharmaceuticals Corporation · 2014
- Lipid formulations115US 9,394,234 B2Arbutus Biopharma Corporation · 2016
- Method for the recovery of betaine from molasses47US 5,127,957 A1992
- Crystalline salts of dodecyl 2-(N,N-dimethylamino)-propionate34US 6,118,020 ANexmed Holdings, Inc. · 2000