C07D 209/56
Ring systems containing three or more rings
C07D209/56 (Ring systems containing three or more rings) appears on 3,468 US grants and 3,826 published applications in this corpus.
Search patents in C07D- Granted patents
- 3,468
- Published applications
- 3,826
- Assignees
- 1,216
- Inventors
- 8,295
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 55 | 0 |
| 1977 | 27 | 0 |
| 1978 | 22 | 0 |
| 1979 | 23 | 0 |
| 1980 | 22 | 0 |
| 1981 | 29 | 0 |
| 1982 | 23 | 0 |
| 1983 | 23 | 0 |
| 1984 | 22 | 0 |
| 1985 | 29 | 0 |
| 1986 | 23 | 0 |
| 1987 | 26 | 0 |
| 1988 | 24 | 0 |
| 1989 | 37 | 0 |
| 1990 | 30 | 0 |
| 1991 | 59 | 0 |
| 1992 | 33 | 0 |
| 1993 | 43 | 0 |
| 1994 | 28 | 0 |
| 1995 | 27 | 0 |
| 1996 | 47 | 0 |
| 1997 | 54 | 0 |
| 1998 | 57 | 0 |
| 1999 | 35 | 0 |
| 2000 | 46 | 0 |
| 2001 | 42 | 13 |
| 2002 | 73 | 60 |
| 2003 | 51 | 96 |
| 2004 | 61 | 108 |
| 2005 | 58 | 111 |
| 2006 | 56 | 98 |
| 2007 | 63 | 123 |
| 2008 | 50 | 142 |
| 2009 | 59 | 136 |
| 2010 | 87 | 124 |
| 2011 | 94 | 151 |
| 2012 | 107 | 131 |
| 2013 | 110 | 145 |
| 2014 | 103 | 161 |
| 2015 | 156 | 179 |
| 2016 | 123 | 189 |
| 2017 | 152 | 189 |
| 2018 | 134 | 209 |
| 2019 | 180 | 231 |
| 2020 | 137 | 215 |
| 2021 | 127 | 157 |
| 2022 | 126 | 200 |
| 2023 | 158 | 236 |
| 2024 | 118 | 179 |
| 2025 | 110 | 143 |
| 2026 | 89 | 100 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aromatic amine derivative, and organic electroluminescent element using same6 Oct 2026US 12,753,145 B2Idemitsu Kosan Co., Ltd.
- Monomer isomerization and polymer fluorination for sustainable depolymerizable polymers6 Oct 2026US 12,753,252 B2The University of Akron
- Organic light emitting diode and organic light emitting device including the same6 Oct 2026US 12,757,624 B2LG Display Co., Ltd.
- Tautomeric ligand enables biomimetic C—H hydroxylation with molecular oxygen22 Sep 2026US 12,741,937 B2The Scripps Research Institute
- Compound, and composition for forming hole transporting layer for perovskite solar cells15 Sep 2026US 12,735,395 B2Tokyo Chemical Industry Co., Ltd.
- Disperse dyes for dyeing polyester fibres8 Oct 2026US 2026/0308841 A1University of Leeds
- Compound for organic optoelectronic device, composition for organic optoelectronic device, organic optoelectronic device, and display device8 Oct 2026US 2026/0314259 A1Samsung SDI.Co., Ltd.
- Pyridine-piperazine-based scaffolds as highly potent and selective neurolysin activators1 Oct 2026US 2026/0294897 A1Board of Regents of the University of Nebraska
- Heterocyclic compound and organic light-emitting device comprising same1 Oct 2026US 2026/0305166 A1Lt Materials Co., Ltd.
- Crystal of n-(benzoyl)-phenylalanine compound, and pharmaceutical composition thereof, and preparation method therefor and use thereof24 Sep 2026US 2026/0285809 A1Apeloa Pharmaceutical Co., Ltd.
Most cited
By later US patents
- Oxime ester photoinitiators263US 7,759,043 B2Ciba Specialty Chemicals Corporation · 2010
- Organometallic complexes as phosphorescent emitters in organic LEDs235US 6,830,828 B2The Trustees of Princeton University · 2004
- Fluorescence and delayed fluorescence-type organic light-emitting material and element194US 8,993,129 B2Kyushu University, National University Corporation · 2015
- Light-emitting element192US 9,604,928 B2Semiconductor Energy Laboratory Co.Ltd. · 2017
- Carvedilol187US 7,056,942 B2Teva Pharmaceutical Industries Ltd. · 2006