C07D 221/06
Ring systems of three rings
C07D221/06 (Ring systems of three rings) appears on 1,018 US grants and 748 published applications in this corpus.
Search patents in C07D- Granted patents
- 1,018
- Published applications
- 748
- Assignees
- 529
- Inventors
- 2,768
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 38 | 0 |
| 1977 | 19 | 0 |
| 1978 | 17 | 0 |
| 1979 | 15 | 0 |
| 1980 | 10 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 9 | 0 |
| 1986 | 14 | 0 |
| 1987 | 10 | 0 |
| 1988 | 6 | 0 |
| 1989 | 11 | 0 |
| 1990 | 13 | 0 |
| 1991 | 18 | 0 |
| 1992 | 10 | 0 |
| 1993 | 23 | 0 |
| 1994 | 20 | 0 |
| 1995 | 15 | 0 |
| 1996 | 31 | 0 |
| 1997 | 34 | 0 |
| 1998 | 39 | 0 |
| 1999 | 37 | 0 |
| 2000 | 34 | 0 |
| 2001 | 37 | 8 |
| 2002 | 37 | 30 |
| 2003 | 28 | 29 |
| 2004 | 15 | 40 |
| 2005 | 16 | 40 |
| 2006 | 23 | 38 |
| 2007 | 7 | 33 |
| 2008 | 20 | 35 |
| 2009 | 20 | 49 |
| 2010 | 23 | 27 |
| 2011 | 17 | 32 |
| 2012 | 32 | 26 |
| 2013 | 30 | 26 |
| 2014 | 29 | 36 |
| 2015 | 30 | 28 |
| 2016 | 25 | 39 |
| 2017 | 23 | 22 |
| 2018 | 16 | 24 |
| 2019 | 19 | 23 |
| 2020 | 18 | 37 |
| 2021 | 24 | 27 |
| 2022 | 19 | 23 |
| 2023 | 19 | 21 |
| 2024 | 17 | 21 |
| 2025 | 12 | 19 |
| 2026 | 10 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tetrahydrobenzo-quinoline sulfonamide derivatives useful as IgE modulators23 Jun 2026US 12,662,455 B2Ucb Biopharma Srl
- Naphthalimide sulfonate derivative, and photoacid generator and photoresist composition which comprise same12 May 2026US 12,624,007 B2Samyang Corporation
- Naphthalimide sulfonate derivative, and photoacid generator and photoresist composition each comprising same12 May 2026US 12,625,427 B2Samyang Corporation
- Dihydro-cyclopenta-isoquinoline sulfonamides derivatives5 May 2026US 12,617,786 B2Ucb Biopharma Srl
- Dihydrocyclopenta-isoquinoline-sulfonamide derivatives compounds17 Mar 2026US 12,577,228 B2Ucb Biopharma Srl
- Photoactive compounds1 Oct 2026US 2026/0299409 A1Merck Patent GmbH
- N-(n-aminoalkyl)phenanthridiunium series of chloride-sensitive fluorophores and methods of use thereof10 Sep 2026US 2026/0265202 A1The General Hospital Corporation
- Phenyl-substituted dihydronaphthyridine compounds, and preparation and use thereof27 Aug 2026US 2026/0250278 A1Jiangsu Suzhong Pharmaceutical Research Institute Co., Ltd.
- Regio-controllable [2+2] benzannulation with two adjacent c(sp3)-h bonds20 Aug 2026US 2026/0242341 A1The Scripps Research Institute
- Thermally activated delayed fluorescent solvent-free organic liquid20 Aug 2026US 2026/0242397 A1
Most cited
By later US patents
- Dimeric and trimeric nucleic acid dyes, and associated systems and methods164US 7,776,567 B2AlleLogic Biosciences Corporation · 2010
- HMG-CoA reductase inhibitors and method156US 6,620,821 B2Bristol-Myers Squibb Company · 2003
- Conformationally restricted aromatic inhibitors of microsomal triglyceride transfer protein and method125US 5,760,246 A1998
- Chemiluminescent acridinium salts117US 5,468,646 AAbbott Laboratories · 1995
- DNA complexes with dyes designed for energy transfer as fluorescent markers110US 5,401,847 AThe Regents of the University of California · 1995