C12P 13/22
Tryptophan
Official title: Tryptophan; Tyrosine; Phenylalanine; 3,4-Dihydroxyphenylalanine
C12P13/22 (Tryptophan) appears on 403 US grants and 395 published applications in this corpus.
Search patents in C12P- Granted patents
- 403
- Published applications
- 395
- Assignees
- 189
- Inventors
- 1,014
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 13 | 0 |
| 1987 | 8 | 0 |
| 1988 | 14 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 6 | 0 |
| 1993 | 1 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 9 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 4 |
| 2002 | 11 | 8 |
| 2003 | 1 | 12 |
| 2004 | 6 | 7 |
| 2005 | 7 | 18 |
| 2006 | 7 | 15 |
| 2007 | 9 | 16 |
| 2008 | 10 | 21 |
| 2009 | 11 | 28 |
| 2010 | 11 | 19 |
| 2011 | 19 | 17 |
| 2012 | 12 | 12 |
| 2013 | 12 | 10 |
| 2014 | 18 | 17 |
| 2015 | 11 | 15 |
| 2016 | 13 | 17 |
| 2017 | 11 | 15 |
| 2018 | 11 | 16 |
| 2019 | 13 | 17 |
| 2020 | 13 | 14 |
| 2021 | 12 | 11 |
| 2022 | 12 | 27 |
| 2023 | 8 | 15 |
| 2024 | 9 | 12 |
| 2025 | 12 | 11 |
| 2026 | 8 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Method of producing carboxylic acid18 Aug 2026US 12,709,763 B2Toray Industries, Inc.
- 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
- Method for efficiently producing L-homophenylalanine and strain producing L- homophenylalanine10 Feb 2026US 12,545,938 B1Jiangnan University
- L-tyrosine-exporting protein variant and method for producing l-tyrosine using the same10 Feb 2026US 12,545,939 B2Cj Cheiljedang Corporation
- 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
- Method for producing methyl compound2 Jul 2026US 2026/0185132 A1Mitsubishi Chemical Corporation
Most cited
By later US patents
- In vivo incorporation of unnatural amino acids304US 7,045,337 B2The Regents of the University of California · 2006
- Methods and compositions for the production of orthogonal tRNA-aminoacyl tRNA synthetase pairs235US 7,083,970 B2The Regents of the University of California · 2006
- Vermiculite as a carrier support for immobilized biological materials135US 4,504,582 AGenex Corporation · 1985
- Production of L-amino acids by transamination68US 4,518,692 AGenetics Institute, Inc. · 1985
- Methods and composition for the production of orthogonal tRNA-aminoacyltRNA synthetase pairs62US 7,354,761 B2The Regents of the University of California · 2008