C07C 2603/18
Fluorenes
Official title: Fluorenes; Hydrogenated fluorenes
C07C2603/18 (Fluorenes) appears on 1,438 US grants and 1,464 published applications in this corpus.
Search patents in C07C- Granted patents
- 1,438
- Published applications
- 1,464
- Assignees
- 632
- Inventors
- 3,669
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 31 | 0 |
| 1977 | 21 | 0 |
| 1978 | 17 | 0 |
| 1979 | 8 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 9 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 12 | 0 |
| 1990 | 12 | 0 |
| 1991 | 30 | 0 |
| 1992 | 24 | 0 |
| 1993 | 17 | 0 |
| 1994 | 12 | 0 |
| 1995 | 26 | 0 |
| 1996 | 19 | 0 |
| 1997 | 29 | 0 |
| 1998 | 37 | 0 |
| 1999 | 23 | 0 |
| 2000 | 25 | 0 |
| 2001 | 33 | 7 |
| 2002 | 36 | 37 |
| 2003 | 33 | 60 |
| 2004 | 50 | 53 |
| 2005 | 32 | 49 |
| 2006 | 25 | 34 |
| 2007 | 30 | 50 |
| 2008 | 22 | 60 |
| 2009 | 30 | 46 |
| 2010 | 37 | 72 |
| 2011 | 43 | 58 |
| 2012 | 42 | 47 |
| 2013 | 32 | 50 |
| 2014 | 37 | 46 |
| 2015 | 46 | 59 |
| 2016 | 40 | 73 |
| 2017 | 46 | 71 |
| 2018 | 53 | 80 |
| 2019 | 65 | 61 |
| 2020 | 56 | 69 |
| 2021 | 56 | 59 |
| 2022 | 39 | 65 |
| 2023 | 53 | 100 |
| 2024 | 38 | 69 |
| 2025 | 36 | 54 |
| 2026 | 36 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aromatic amine derivative, and organic electroluminescent element using same6 Oct 2026US 12,753,145 B2Idemitsu Kosan Co., Ltd.
- Methods for preparing (2S,3R,4R)-4,5-dihydroxyisoleucine derivative and intermediates thereof15 Sep 2026US 12,735,384 B2Inner Mongolia Duhe Innovation R & D Tech Co., Ltd
- Compound, coating composition comprising same, organic light-emitting device using same, and manufacturing method therefor8 Sep 2026US 12,729,312 B2LG Chem.Ltd.
- Processes for preparing conjugates of the IL-2 protein1 Sep 2026US 12,723,058 B2Merck Sharp & Dohme Corp.
- Heterocyclic compound and organic light emitting device comprising same1 Sep 2026US 12,727,378 B2Lt Materials Co., Ltd.
- Organic electroluminescent compound, a plurality of host materials, and organic electroluminescent device comprising the same8 Oct 2026US 2026/0314256 A1
- Organic Photoredox Catalysts, Compositions, and Conversion Processes24 Sep 2026US 2026/0284647 A1Colorado State University Research Foundation
- Light-emitting device, light-emitting apparatus, electronic apparatus, and lighting device17 Sep 2026US 2026/0282738 A1Semiconductor Energy Laboratory Co.Ltd.
- Method for producing o-substituted serine derivative27 Aug 2026US 2026/0250241 A1Chugai Seiyaku Kabushiki Kaisha
- Aromatic amine compound, electroluminescent device, and display apparatus20 Aug 2026US 2026/0247854 A1Boe Technology Group Co., Ltd.
Most cited
By later US patents
- Bioconjugation of macromolecules259US 6,737,236 B1Proligo LLC · 2004
- Spiro compounds and their use as electroluminescence materials179US 5,840,217 AHoechst Aktiengesellschaft · 1998
- Sigma receptor ligands and the use thereof150US 6,057,371 AVirginia Commonwealth University · 2000
- Metallocenes and processes therefor and therewith148US 5,399,636 APhillips Petroleum Company · 1995
- Organometallic fluorenyl compounds, preparation, and use147US 5,436,305 APhillips Petroleum Company · 1995