C07D 307/89
With two oxygen atoms directly attached in positions 1 and 3
Official title: with two oxygen atoms directly attached in positions 1 and 3
C07D307/89 (With two oxygen atoms directly attached in positions 1 and 3) appears on 295 US grants and 178 published applications in this corpus.
Search patents in C07D- Granted patents
- 295
- Published applications
- 178
- Assignees
- 150
- Inventors
- 597
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 13 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 10 | 0 |
| 1986 | 6 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 9 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 9 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 6 | 10 |
| 2004 | 3 | 4 |
| 2005 | 3 | 4 |
| 2006 | 7 | 8 |
| 2007 | 2 | 3 |
| 2008 | 7 | 17 |
| 2009 | 4 | 14 |
| 2010 | 4 | 6 |
| 2011 | 10 | 19 |
| 2012 | 7 | 8 |
| 2013 | 11 | 7 |
| 2014 | 15 | 12 |
| 2015 | 14 | 10 |
| 2016 | 5 | 8 |
| 2017 | 8 | 9 |
| 2018 | 7 | 4 |
| 2019 | 6 | 8 |
| 2020 | 7 | 2 |
| 2021 | 3 | 8 |
| 2022 | 3 | 4 |
| 2023 | 5 | 3 |
| 2024 | 4 | 5 |
| 2025 | 5 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Acidic elimination for bio-based aromatics25 Nov 2025US 12,479,787 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Method for purification of a bisphenol a dianhydride composition, bisphenol a dianhydride composition, poly(etherimide) derived from the bisphenol a dianhydride composition, and articles prepared therefrom21 Oct 2025US 12,448,361 B2Shpp Global Technologies B.V.
- Anhydride compound, polyimide, and thin film16 Sep 2025US 12,415,893 B2Industrial Technology Research Institute
- Method of making a biphenol dianhydride composition, method for purification of a biphenol dianhydride, and poly(etherimide)s derived from the biphenol dianhydride24 Jun 2025US 12,338,222 B2Shpp Global Technologies B.V.
- Method of making a biphenol dianhydride composition, method for purification of a biphenol dianhydride composition, and poly (etherimides) derived from the biphenol dianhydride25 Mar 2025US 12,258,448 B2Shpp Global Technologies B.V.
- Tube bundle reactor24 Sep 2026US 2026/0284622 A1MAN Energy Solutions SE
- Material for forming organic film, substrate for manufacturing semiconductor device, method for forming organic film, patterning process, compound for forming organic film, and aromatic carboxylic anhydride9 Apr 2026US 2026/0101693 A1Shin-Etsu Chemical Co., Ltd.
- Method for isomerizing methyltetrahydrophthalic anhydride30 Jan 2025US 2025/0034103 A1Nan Ya Plastics Corporation
- Rechargeable lithium battery5 Dec 2024US 2024/0405277 A1Samsung SDI.Co., Ltd.
- Acid dianhydride1 Aug 2024US 2024/0254285 A1Mitsubishi Gas Chemical Company, Inc.
Most cited
By later US patents
- 4,4'-Isopropylidene-bis(3- and 4-phenyleneoxyphthalic anhydride)129US 3,972,902 AGeneral Electric Company · 1976
- Substituted dipeptides as inhibitors of enkephalinases81US 4,906,615 ASchering Corporation · 1990
- Carbidopa prodrugs and derivatives, and compositions and uses thereof80US 7,101,912 B2XenoPort, Inc. · 2006
- Substituted dipeptides as inhibitors of enkephalinases74US 4,610,816 ASchering Corporation · 1986
- Derivatization of non-natural amino acids and polypeptides61US 7,385,028 B2Ambrx, Inc. · 2008