C07D 231/28
Two oxygen or sulfur atoms
C07D231/28 (Two oxygen or sulfur atoms) appears on 135 US grants and 62 published applications in this corpus.
Search patents in C07D- Granted patents
- 135
- Published applications
- 62
- Assignees
- 82
- Inventors
- 399
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 6 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 3 |
| 2003 | 4 | 2 |
| 2004 | 2 | 5 |
| 2005 | 3 | 6 |
| 2006 | 1 | 3 |
| 2007 | 2 | 10 |
| 2008 | 3 | 4 |
| 2009 | 8 | 3 |
| 2010 | 2 | 2 |
| 2011 | 1 | 2 |
| 2012 | 4 | 2 |
| 2013 | 2 | 2 |
| 2014 | 0 | 3 |
| 2015 | 2 | 0 |
| 2016 | 1 | 6 |
| 2017 | 2 | 1 |
| 2018 | 3 | 2 |
| 2019 | 2 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for the preparation of sulfinpyrazone14 Jul 2026US 12,679,810 B2
- O-substituted hydroxamic acids9 Feb 2021US 10,913,728 B2The Johns Hopkins University
- Method for synthesizing 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid and intermediates thereof11 Feb 2020US 10,556,868 B2Zhejiang Yongtai Technology Co., Ltd.
- Toner and charge control agent using pyrazolone derivative or salt of derivative12 Nov 2019US 10,474,050 B2Hodogaya Chemical Co., Ltd.
- Polarizing plate composition, polarizing plate protective film, polarizer, polarizing plate, and liquid crystal display device9 Apr 2019US 10,254,456 B2FUJIFILM Corporation
- Pyrazolidine-3, 5-dione based compounds and a process for preparation thereof30 Jul 2026US 2026/0217657 A1Council of Scientific and Industrial Research
- Prostaglandin e receptor 4 antagonists25 Jun 2026US 2026/0176577 A1National Health Research Institutes
- Compound, polymerizable composition, optically anisotropic film, optical film, polarizing plate, and image display device3 Oct 2024US 2024/0327556 A1FUJIFILM Corporation
- Method for the preparation of sulfinpyrazone3 Aug 2023US 2023/0242490 A1ChengDa Pharmaceuticals Co., Ltd.
- Method for synthesizing 3-(difluoromethyl)-1-methyl-1h-pyrazole-4-carboxylic acid and intermediates thereof4 Jul 2019US 2019/0202791 A1Zhejiang Yongtai Technology Co., Ltd.
Most cited
By later US patents
- Corticotropin-releasing factor antagonism compounds73US 5,063,245 ANova Pharmaceutical Corporation · 1991
- Herbicides64US 6,894,005 B1Syngenta Crop Protection AG · 2005
- Pyrazoloquinolines58US 4,312,870 ACiba-Geigy Corporation · 1982
- Substituted aryl keto-enolic heterocycles58US 5,683,965 ABayer Aktiengesellschaft · 1997
- Potent inducers of terminal differentiation and methods of use thereof49US 5,175,191 ASloan-Kettering Institute for Cancer Research · 1992