C07C 263/12
From or via nitrogen analogues of carboxylic acids
Official title: from or via nitrogen analogues of carboxylic acids, e.g. from hydroxamic acids, involving a Hofmann, Curtius or Lossen-type rearrangement (C07C209/56 takes precedence)
C07C263/12 (From or via nitrogen analogues of carboxylic acids) appears on 21 US grants and 6 published applications in this corpus.
Search patents in C07C- Granted patents
- 21
- Published applications
- 6
- Assignees
- 19
- Inventors
- 59
- Latest grant
- 14 Nov 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Isocyanates, derivatives, and processes for producing the same14 Nov 2023US 11,814,360 B2Novomer, Inc.
- Biobased diisocyanates, and process for preparation of same4 Jan 2022US 11,214,539 B1Evoco Limited
- Bio-based aromatic diisocyanates for preparation of polyurethanes24 Apr 2018US 9,950,996 B2Council of Scientific and Industrial Research
- Reaction accelerator and method of producing urethane compound, thiourethane compound, amide compound, or urea compound using same23 May 2017US 9,656,952 B2Showa Denko K. K.
- Process for the production of sitagliptin16 Dec 2014US 8,912,327 B2Chemo Iberica, S. A.
- Catalytic synthesis of free isocyanates10 Oct 2024US 2024/0336561 A1
- Flow chemistry synthesis of isocyanates30 Mar 2023US 2023/0095750 A1The Regents of the University of California
- Isocyanates, derivatives, and processes for producing the same22 Oct 2020US 2020/0331876 A1Novomer, Inc.
- Bio-based aromatic diisocyanates for preparation of polyurethanes28 Dec 2017US 2017/0369427 A1Council of Scientific and Industrial Research
- Reaction accelerator and method of producing urethane compound, thiourethane compound, amide compound, or urea compound using same9 Jun 2016US 2016/0159733 A1Showa Denko K. K.
Most cited
By later US patents
- Paclitaxel prodrugs, method for preparation as well as their use in selective chemotherapy8US 5,760,072 APharmachemie B.V. · 1998
- Preparation of isocyanates7US 4,322,365 ABASF SE · 1982
- Preparation of isocyanates and/or derivatives thereof6US 4,430,262 AShell Oil Company · 1984
- Beneficial use of water in catalytic conversion of formamides to isocyanates6US 4,683,329 AE. I. DuPont de Nemours and Company · 1987
- Process for the preparation of isocyanate derivatives of aliphatic, cycloaliphatic, and araliphatic compounds4US 4,238,404 AAkzona Incorporated · 1980