C07C 227/34
By separation of optical isomers
Official title: by separation of optical isomers
C07C227/34 (By separation of optical isomers) appears on 109 US grants and 70 published applications in this corpus.
Search patents in C07C- Granted patents
- 109
- Published applications
- 70
- Assignees
- 85
- Inventors
- 338
- Latest grant
- 1 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 2 |
| 2002 | 4 | 4 |
| 2003 | 3 | 3 |
| 2004 | 4 | 5 |
| 2005 | 2 | 6 |
| 2006 | 6 | 4 |
| 2007 | 1 | 2 |
| 2008 | 2 | 5 |
| 2009 | 3 | 3 |
| 2010 | 3 | 2 |
| 2011 | 2 | 8 |
| 2012 | 3 | 5 |
| 2013 | 4 | 1 |
| 2014 | 3 | 2 |
| 2015 | 5 | 4 |
| 2016 | 2 | 2 |
| 2017 | 3 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 5 |
| 2020 | 2 | 0 |
| 2021 | 1 | 2 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Chiral resolution method mimicking magnetic beneficiation and the magnetic nano-inhibitors for selective enrichment1 Oct 2024US 12,104,022 B2Peking University
- Method for resolution of baclofen salts3 Aug 2021US 11,078,152 B2Universite De Rouen
- Method for synthesizing novel chiral ligand, metal chelate, a variety of non-natural amino acids, maraviroc and key intermediate thereof29 Dec 2020US 10,875,883 B2Shanghai Institute of Materia Medica, Chinese Academy of Sciences
- Process for electrochemical separation of enantiomers of an amino acid from a racemic mixture6 Oct 2020US 10,793,513 B2Srm University
- 5-substituted-5-hydroxy-5-aryl-3-oxo-pentanoate derivatives and their enantiopure forms13 Nov 2018US 10,125,074 B2Okinawa Institute of Science and Technology School Corporation
- Method for resolving phenylalanine derivative, and intermediate14 May 2026US 2026/0132101 A1Neuboron Bio-Scitech Co., Ltd.
- Process for the Preparation of R-Oxybutynin Hydrochloride13 Nov 2025US 2025/0346553 A1Harman Finochem Limited
- Process to produce (1r,4r)-4-substituted cyclohexane-1-amines17 Apr 2025US 2025/0122542 A1Budapesti Muszaki Es Gazdasagtudomanyi Egyetem
- Method for producing 2-octylglycine ester having optical activity17 Jun 2021US 2021/0179538 A1Aminologics Co., Ltd.
- A chiral resolution method mimicking magnetic beneficiation and the magnetic nano-inhibitors for selective enrichment3 Jun 2021US 2021/0163695 A1Peking University
Most cited
By later US patents
- Locking nut, bolt and clip systems and assemblies63US 6,010,289 APermanent Technologies, Inc. · 2000
- Process for the preparation of D(-) and L(+)-3,3-diphenylalanine and D(-) and L(+)-substituted 3,3-diphenylalanines and derivatives thereof37US 5,198,548 AWarner-Lambert Company · 1993
- Method of making (S)-3-(aminomethyl)-5-methylhexanoic acid36US 5,637,767 AWarner-Lambert Company · 1997
- Separation of mixtures by two-phase systems31US 5,078,886 ALehigh University · 1992
- Supported chiral liquid membrane for the separation of enantiomers25US 5,080,795 AResearch Corporation Technologies, Inc. · 1992