C07C 2603/52
Containing five condensed rings
Official title: containing five condensed rings
C07C2603/52 (Containing five condensed rings) appears on 252 US grants and 318 published applications in this corpus.
Search patents in C07C- Granted patents
- 252
- Published applications
- 318
- Assignees
- 141
- Inventors
- 736
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 2 |
| 2002 | 2 | 2 |
| 2003 | 0 | 7 |
| 2004 | 3 | 4 |
| 2005 | 4 | 6 |
| 2006 | 3 | 8 |
| 2007 | 1 | 10 |
| 2008 | 6 | 11 |
| 2009 | 2 | 21 |
| 2010 | 11 | 25 |
| 2011 | 20 | 24 |
| 2012 | 16 | 22 |
| 2013 | 13 | 11 |
| 2014 | 16 | 18 |
| 2015 | 18 | 21 |
| 2016 | 10 | 16 |
| 2017 | 11 | 9 |
| 2018 | 14 | 14 |
| 2019 | 12 | 15 |
| 2020 | 12 | 17 |
| 2021 | 18 | 14 |
| 2022 | 10 | 16 |
| 2023 | 8 | 7 |
| 2024 | 10 | 11 |
| 2025 | 7 | 5 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Organic electroluminescent element, compound, and electronic equipment28 Jul 2026US 12,692,435 B2Idemitsu Kosan Co., Ltd.
- Method of preparing triterpenoid compound5 May 2026US 12,617,746 B2National Taiwan University
- Organic electroluminescent element and electronic device24 Mar 2026US 12,583,864 B2Idemitsu Kosan Co., Ltd.
- Organic electroluminescence element, composition, powder, electronic equipment, and novel compound17 Mar 2026US 12,581,850 B2Idemitsu Kosan Co., Ltd.
- Heterocylic compound and light-emitting device and electronic apparatus including the heterocyclic compound10 Mar 2026US 12,570,630 B2Samsung Display Co., Ltd.
- Compound, light-emitting device including same, and electronic apparatus and electronic equipment each including same30 Apr 2026US 2026/0123276 A1Samsung Display Co., Ltd.
- Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device8 Jan 2026US 2026/0008745 A1Idemitsu Kosan Co., Ltd.
- Antioxidant inflammation modulators: oleanolic acid derivatives with amino and other modifications at c-1720 Nov 2025US 2025/0353813 A1Reata Pharmaceuticals Holdings, LLC
- Ursolic acid diethanolamine salt13 Nov 2025US 2025/0346627 A1Emmyon, Inc.
- Organic electroluminescence element, composition, powder, electronic equipment, and novel compound18 Sep 2025US 2025/0295024 A1Idemitsu Kosan Co., Ltd.
Most cited
By later US patents
- Substituted diphenylanthracene compounds for organic electroluminescence devices82US 7,053,255 B2Idemitsu Kosan Co., Ltd. · 2006
- Organic electroluminescent device60US 6,743,948 B1Idemitsu Kosan Co., Ltd. · 2004
- Antioxidant inflammation modulators: oleanolic acid derivatives with amino and other modifications at C-1750US 8,124,799 B2Reata Pharmaceuticals, Inc. · 2012
- Antioxidant inflammation modulators: oleanolic acid derivatives with amino acid and other modifications at C-1745US 8,440,854 B2Reata Pharmaceuticals, Inc. · 2013
- Organic electroluminescence device42US 6,951,693 B2Idemitsu Kosan Co., Ltd. · 2005