C07D 251/42
One nitrogen atom
C07D251/42 (One nitrogen atom) appears on 399 US grants and 219 published applications in this corpus.
Search patents in C07D- Granted patents
- 399
- Published applications
- 219
- Assignees
- 178
- Inventors
- 914
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 11 | 0 |
| 1978 | 11 | 0 |
| 1979 | 10 | 0 |
| 1980 | 18 | 0 |
| 1981 | 12 | 0 |
| 1982 | 10 | 0 |
| 1983 | 9 | 0 |
| 1984 | 19 | 0 |
| 1985 | 8 | 0 |
| 1986 | 11 | 0 |
| 1987 | 13 | 0 |
| 1988 | 13 | 0 |
| 1989 | 6 | 0 |
| 1990 | 12 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 9 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 9 | 0 |
| 2001 | 1 | 1 |
| 2002 | 19 | 13 |
| 2003 | 7 | 21 |
| 2004 | 21 | 13 |
| 2005 | 4 | 12 |
| 2006 | 7 | 14 |
| 2007 | 12 | 11 |
| 2008 | 10 | 6 |
| 2009 | 3 | 7 |
| 2010 | 6 | 6 |
| 2011 | 6 | 8 |
| 2012 | 3 | 11 |
| 2013 | 7 | 12 |
| 2014 | 8 | 14 |
| 2015 | 15 | 9 |
| 2016 | 6 | 7 |
| 2017 | 10 | 4 |
| 2018 | 4 | 5 |
| 2019 | 5 | 5 |
| 2020 | 3 | 5 |
| 2021 | 4 | 7 |
| 2022 | 4 | 3 |
| 2023 | 4 | 8 |
| 2024 | 2 | 10 |
| 2025 | 5 | 5 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- CFTR regulators and methods of use thereof19 Aug 2025US 12,391,654 B2The Regents of the University of California
- Organic electroluminescent materials and devices27 May 2025US 12,317,745 B2Universal Display Corporation
- Anti-microbial compound and methods of use6 May 2025US 12,290,073 B2Shenzhen University
- Heteroaryl inhibitors of PDE41 Apr 2025US 12,264,169 B2Tetra Discovery Partners, LLC
- Method for the industrial production of 2-halo-4,6-dialkoxy-1,3,5-triazines and their use in the presence of amines4 Feb 2025US 12,215,088 B2Crossing Srl
- Novel tag for liquid-phase peptide synthesis17 Sep 2026US 2026/0274806 A1Cordenpharma International
- Cftr regulators and methods of use thereof16 Apr 2026US 2026/0103446 A1The Regents of the University of California
- Crosslinking agent for chlorinated butyl rubber6 Nov 2025US 2025/0340719 A1Kawaguchi Chemical Industry Co., Ltd.
- Organic electroluminescent materials and devices21 Aug 2025US 2025/0263554 A1Universal Display Corporation
- Cftr regulators and methods of use thereof3 Apr 2025US 2025/0109113 A1The Regents of the University of California
Most cited
By later US patents
- Herbicidal sulfonamides124US 4,127,405 AE. I. Du Pont de Nemours and Company · 1978
- Herbicidal sulfonamides102US 4,169,719 AE. I. Du Pont de Nemours and Company · 1979
- Agricultural sulfonamides60US 4,383,113 AE. I. Du Pont de Nemours and Company · 1983
- N(Substituted phenylsulfonyl) N'(substituted cyumidin-2-yl) ureas58US 4,310,346 AE. I. Du Pont de Nemours and Company · 1982
- N,N′-substituted-1,3-diamino-2-hydroxypropane derivatives56US 7,176,242 B2Elan Pharmaceuticals, Inc. · 2007