C12P 13/227
Tryptophan
Official title: {Tryptophan}
C12P13/227 (Tryptophan) appears on 173 US grants and 186 published applications in this corpus.
Search patents in C12P- Granted patents
- 173
- Published applications
- 186
- Assignees
- 72
- Inventors
- 440
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 4 | 3 |
| 2003 | 1 | 5 |
| 2004 | 5 | 6 |
| 2005 | 5 | 5 |
| 2006 | 1 | 5 |
| 2007 | 6 | 13 |
| 2008 | 6 | 8 |
| 2009 | 4 | 11 |
| 2010 | 4 | 9 |
| 2011 | 10 | 6 |
| 2012 | 3 | 6 |
| 2013 | 6 | 7 |
| 2014 | 10 | 7 |
| 2015 | 7 | 11 |
| 2016 | 3 | 10 |
| 2017 | 6 | 8 |
| 2018 | 6 | 6 |
| 2019 | 5 | 8 |
| 2020 | 8 | 8 |
| 2021 | 5 | 5 |
| 2022 | 7 | 11 |
| 2023 | 6 | 4 |
| 2024 | 5 | 8 |
| 2025 | 5 | 3 |
| 2026 | 3 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Application of transport carrier gene which improves L-tryptophan production efficiency in Escherichia coli22 Sep 2026US 12,742,188 B2Ningxia Eppen Biotech Co., Ltd
- Microorganism of the genus Corynebacterium for producing L-amino acid and method for producing L-amino acid using the same3 Mar 2026US 12,565,670 B2Cj Cheiljedang Corporation
- Engineered beta-subunit of tryptophan synthase for production of non-canonical amino acids27 Jan 2026US 12,534,748 B2California Institute of Technology
- Promoter and use thereof18 Nov 2025US 12,473,558 B2Cj Cheiljedang Corporation
- Engineered synthase for production of tryptophan derivatives and intransigent substrates12 Aug 2025US 12,385,029 B2California Institute of Technology
- Fructokinase variant and method for producing l-amino acid using same24 Sep 2026US 2026/0286320 A1Cj Cheiljedang Corporation
- Microorganism introduced with foreign glutamine synthetase and method of producing ltryptophan using the same30 Jul 2026US 2026/0218116 A1Cj Cheiljedang Corporation
- Microorganisms introduced with exogenous soluble pyridine nucleotide transhydrogenase and method for producing l-tryptophan using the same30 Jul 2026US 2026/0218212 A1Cj Cheiljedang Corporation
- Microorganism introduced with exogenous soluble pyridine nucleotide transhydrogenase and method for producing l-tryptophan using same30 Jul 2026US 2026/0218256 A1Cj Cheiljedang Corporation
- Novel zinc-binding dehydrogenase variant and method for producing l-aromatic amino acid using same25 Jun 2026US 2026/0176662 A1Daesang Corporation
Most cited
By later US patents
- Method of catalyzing chemical reactions46US 4,888,281 AIgen, Inc. · 1989
- Method of producing chemical by continuous fermentation and continuous fermentation apparatus46US 9,644,221 B2Toray Industries, Inc. · 2017
- Catalytic antibodies as chemical sensors42US 6,846,654 B1IGEN International, Inc. · 2005
- E.Coli bacteria carrying recombinant plasmids and their use in the fermentative production of L-tryptophan40US 4,371,614 AAjinomoto Co., Inc. · 1983
- Process for producing L-tryptophan by culturing a Corynebacterium glutamicum mutant37US 5,275,940 AKyowa Hakko Kogyo Co., Ltd. · 1994