C07D 221/20
Spiro-condensed ring systems
C07D221/20 (Spiro-condensed ring systems) appears on 444 US grants and 409 published applications in this corpus.
Search patents in C07D- Granted patents
- 444
- Published applications
- 409
- Assignees
- 286
- Inventors
- 1,720
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 10 | 0 |
| 1993 | 7 | 0 |
| 1994 | 11 | 0 |
| 1995 | 15 | 0 |
| 1996 | 11 | 0 |
| 1997 | 10 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 13 | 0 |
| 2002 | 11 | 13 |
| 2003 | 11 | 9 |
| 2004 | 4 | 13 |
| 2005 | 10 | 20 |
| 2006 | 4 | 16 |
| 2007 | 8 | 12 |
| 2008 | 9 | 24 |
| 2009 | 13 | 15 |
| 2010 | 20 | 23 |
| 2011 | 14 | 8 |
| 2012 | 9 | 13 |
| 2013 | 12 | 5 |
| 2014 | 7 | 14 |
| 2015 | 8 | 10 |
| 2016 | 9 | 12 |
| 2017 | 16 | 19 |
| 2018 | 10 | 16 |
| 2019 | 18 | 20 |
| 2020 | 17 | 15 |
| 2021 | 11 | 21 |
| 2022 | 9 | 30 |
| 2023 | 10 | 23 |
| 2024 | 15 | 21 |
| 2025 | 15 | 19 |
| 2026 | 13 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- HDAC6 inhibitors and uses thereof16 Jun 2026US 12,655,106 B2Eikonizo Therapeutics, Inc.
- Organic light-emitting diode16 Jun 2026US 12,655,149 B2LG Chem.Ltd.
- Compound for organic electronic element, organic electronic element using the same, and an electronic device thereof26 May 2026US 12,637,400 B2Duk San Neolux Co., Ltd.
- Kif18a inhibitor compound, and pharmaceutical composition and preparation method therefor and use thereof1 Oct 2026US 2026/0294927 A1Changchun Genescience Pharmaceutical Co., Ltd.
- Quinolineimine antidegradant compounds and uses thereof24 Sep 2026US 2026/0285812 A1Flexsys IP Holdings, LLC
- Crystal forms of nitrogen-containing spiro compound, preparation method therefor and use thereof10 Sep 2026US 2026/0265203 A1Wuhan Createrna Science and Technology Co., Ltd.
- Aromatic Amide Derivative, And Preparation Method Therefor And Medical Use Thereof3 Sep 2026US 2026/0256762 A1Shanghai Aryl Pharmtech Co., Ltd.
- Heterocyclic compounds as pi3ka inhibitors6 Aug 2026US 2026/0226010 A1Pikavation Therapeutics, Inc.
Most cited
By later US patents
- HMG-CoA reductase inhibitors and method156US 6,620,821 B2Bristol-Myers Squibb Company · 2003
- Chromogenic acridinone enzyme substrates137US 4,810,636 AMiles Inc. · 1989
- Arylpiperazinylalkoxy derivatives of cyclic imides84US 4,780,466 AHoechst-Roussel Pharmaceuticals Inc. · 1988
- Fredericamycin derivatives as medicaments for treating tumours81US 7,244,741 B2Biofrontera Discovery GmbH · 2007
- Fredericamycin derivatives81US 7,459,462 B2Biofrontera Discovery GmbH · 2008