C07C 13/66
The condensed ring system contains only four rings
Official title: the condensed ring system contains only four rings
C07C13/66 (The condensed ring system contains only four rings) appears on 122 US grants and 154 published applications in this corpus.
Search patents in C07C- Granted patents
- 122
- Published applications
- 154
- Assignees
- 75
- Inventors
- 378
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 2 |
| 2004 | 2 | 2 |
| 2005 | 0 | 5 |
| 2006 | 1 | 3 |
| 2007 | 1 | 5 |
| 2008 | 2 | 15 |
| 2009 | 2 | 15 |
| 2010 | 7 | 6 |
| 2011 | 10 | 7 |
| 2012 | 8 | 11 |
| 2013 | 5 | 4 |
| 2014 | 5 | 16 |
| 2015 | 6 | 7 |
| 2016 | 6 | 5 |
| 2017 | 8 | 9 |
| 2018 | 8 | 5 |
| 2019 | 9 | 4 |
| 2020 | 5 | 4 |
| 2021 | 4 | 4 |
| 2022 | 3 | 7 |
| 2023 | 1 | 2 |
| 2024 | 3 | 5 |
| 2025 | 4 | 6 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compound, organic electroluminescent element and electronic device28 Jul 2026US 12,692,212 B2Idemitsu Kosan Co., Ltd.
- Compound and an organic semiconducting layer, an organic electronic device and a display or lighting device comprising the same17 Mar 2026US 12,577,212 B2Novaled GmbH
- Compound, organic electroluminescence device using the same, and electronic apparatus6 Jan 2026US 12,516,240 B2Idemitsu Kosan Co., Ltd.
- Composition, resist underlayer film, method of forming film, method of producing patterned substrate, and compound6 Jan 2026US 12,517,433 B2Jsr Corporation
- Method for preparing an organic semiconducting layer, a composition for use therein and an organic electronic device25 Nov 2025US 12,484,431 B2Novaled GmbH
- Glycosylation and alkylation method involving benziodoxole reagent11 Jun 2026US 2026/0159507 A1Huazhong University of Science and Technology
- Precursor compound of tetracyclic hydrocarbon and preparation method thereof2 Apr 2026US 2026/0092026 A1
- Novel compound, organic electroluminescence device using the same, and electronic apparatus12 Mar 2026US 2026/0071120 A1Idemitsu Kosan Co., Ltd.
- Organic electroluminescent materials and devices14 Aug 2025US 2025/0261558 A1Universal Display Corporation
- Organic light-emitting device31 Jul 2025US 2025/0248300 A1
Most cited
By later US patents
- Imaging system using novel charge transport layer110US 4,233,384 AXerox Corporation · 1980
- Fluorene compound and organic luminescent device using the same41US 7,241,513 B2Canon Kabushiki Kaisha · 2007
- Organic electroluminescence device and anthracene derivative39US 7,839,074 B2Idemitsu Kosan Co., Ltd. · 2010
- Anthracene derivative having a phenanthryl group28US 9,660,195 B2Idemitsu Kosan Co., Ltd. · 2017
- Perylene compound and organic light emitting device using the compound18US 9,051,232 B2Canon Kabushiki Kaisha · 2015