C07D 251/20
With no nitrogen atoms directly attached to a ring carbon atom
Official title: with no nitrogen atoms directly attached to a ring carbon atom
C07D251/20 (With no nitrogen atoms directly attached to a ring carbon atom) appears on 128 US grants and 55 published applications in this corpus.
Search patents in C07D- Granted patents
- 128
- Published applications
- 55
- Assignees
- 65
- Inventors
- 338
- Latest grant
- 28 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 7 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 3 |
| 2003 | 2 | 3 |
| 2004 | 2 | 2 |
| 2005 | 0 | 0 |
| 2006 | 3 | 7 |
| 2007 | 1 | 3 |
| 2008 | 2 | 1 |
| 2009 | 3 | 1 |
| 2010 | 0 | 3 |
| 2011 | 3 | 3 |
| 2012 | 2 | 2 |
| 2013 | 2 | 2 |
| 2014 | 0 | 3 |
| 2015 | 4 | 3 |
| 2016 | 3 | 1 |
| 2017 | 1 | 1 |
| 2018 | 2 | 4 |
| 2019 | 2 | 1 |
| 2020 | 1 | 2 |
| 2021 | 1 | 0 |
| 2022 | 3 | 4 |
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stacked organic electroluminescent device28 Oct 2025US 12,454,538 B2Beijing Summer Sprout Technology Co., Ltd.
- Materials for organic electroluminescent devices1 Oct 2024US 12,108,665 B2Merck KGaA
- Prostaglandin E synthase inhibitors and methods for utilizing the same9 Jul 2024US 12,030,877 B2University of Kentucky Research Foundation
- Impact of trace elements in the Grignard reaction11 Jul 2023US 11,697,641 B2BASF SE
- Deoxyuridine triphosphatase inhibitors25 Oct 2022US 11,479,531 B2CV6 Therapeutics (NI) Limited
- Lipid compound and composition for delivery of active substance2 Jul 2026US 2026/0184669 A1Korea Research Institute of Bioscience and Biotechnology
- Light-emitting device including organic compound, electronic apparatus and electronic device including the light-emitting device, and the organic compound14 May 2026US 2026/0136827 A1Samsung Display Co., Ltd.
- Material for metal patterning, heterocyclic compound, thin film for metal patterning, organic electroluminescent device, electronic device, and method for forming metal pattern15 May 2025US 2025/0154114 A1Tosoh Corporation
- Novel compound for light emitting device and organic light emitting device including same15 Aug 2024US 2024/0276871 A1Dongjin Semichem Co., Ltd.
- Chemical coupling linker and use thereof1 Aug 2024US 2024/0252665 A1Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.
Most cited
By later US patents
- Polymeric cyclic N-halamine biocidal compounds65US 5,490,983 AAuburn University · 1996
- Mixtures of matrix materials and organic semiconductors capable of emission, use of the same and electronic components containing said mixtures40US 7,345,301 B2Merck Patent GmbH · 2008
- High performance lubricants comprising triazine derivatives35US 5,032,301 AThe Dow Chemical Company · 1991
- Monomeric and polymeric cyclic amine and-halamine compounds35US 5,670,646 AAuburn University · 1997
- Monomeric and polymeric cyclic amine and N-halamine compounds29US 5,889,130 AAuburn University · 1999