C07D 493/20
Spiro-condensed systems
C07D493/20 (Spiro-condensed systems) appears on 142 US grants and 135 published applications in this corpus.
Search patents in C07D- Granted patents
- 142
- Published applications
- 135
- Assignees
- 132
- Inventors
- 542
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 1 |
| 2003 | 4 | 4 |
| 2004 | 3 | 5 |
| 2005 | 0 | 6 |
| 2006 | 1 | 5 |
| 2007 | 2 | 7 |
| 2008 | 3 | 3 |
| 2009 | 5 | 5 |
| 2010 | 4 | 5 |
| 2011 | 4 | 9 |
| 2012 | 4 | 7 |
| 2013 | 8 | 9 |
| 2014 | 10 | 10 |
| 2015 | 9 | 7 |
| 2016 | 6 | 5 |
| 2017 | 6 | 7 |
| 2018 | 3 | 8 |
| 2019 | 7 | 3 |
| 2020 | 2 | 3 |
| 2021 | 4 | 7 |
| 2022 | 2 | 5 |
| 2023 | 3 | 4 |
| 2024 | 3 | 5 |
| 2025 | 0 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compounds constituting C20-modified salinomycin derivatives, a method for obtaining the same, a composition containing the same, a use of said compounds and a method for obtaining an intermediate product22 Sep 2026US 12,741,974 B2Fileclo Sp. Z O.O.
- Method for preparing dihydroartemisinin bulk drug in single process17 Sep 2024US 12,091,419 B2Vinsce Bio-pharm (Suzhou) Co., Ltd.
- Materials for organic electroluminescent devices26 Mar 2024US 11,939,339 B2Merck Patent GmbH
- Organic compound, electroluminescent material, and application thereof26 Mar 2024US 11,939,341 B2Wuhan Tianma Microelectronics Co., Ltd.
- Composition, method of manufacture, and use of site-specific delivery of bruceolides for treatment of cancer and other diseases28 Nov 2023US 11,826,344 B2Howard University
- Dihydroartemisinin derivatives and methods of making and use thereof25 Jun 2026US 2026/0176286 A1
- Anti-cancer derivatives of ovatodiolide and use thereof27 Nov 2025US 2025/0360100 A1Arjil Biotech Holding Company Limited
- Derivative of artemisinin and preparation method and use thereof20 Nov 2025US 2025/0353861 A1Shanghai Innofortune Biotech Co. Ltd.
- Nitrogen-containing derivatives of narasin, synthesis and uses thereof7 Aug 2025US 2025/0250280 A1Centre National De La Recherche Scientifique
- Bilobalide derivative compounds for treating neurological diseases and cancers8 May 2025US 2025/0144069 A1The Chinese University of Hong Kong
Most cited
By later US patents
- Method for manufacturing a semiconductor device and suppressing the generation of bulk microdefects near the substrate surface layer87US 4,931,405 AKabushiki Kaisha Toshiba · 1990
- Intermediates for the preparation of analogs of Halichondrin B63US 7,982,060 B2Eisai R&D Management Co., Ltd. · 2011
- Intermediates and methods for the synthesis of halichondrin B analogs58US 8,093,410 B2Eisai R&D Management Co., Ltd. · 2012
- Intermediates for the preparation of analogs of halichondrin B49US 8,445,701 B2Eisai R&D Management Co., Ltd. · 2013
- Intermediates for the preparation of analogs of Halichondrin B46US 8,618,313 B2Eisai R&D Management Co., Ltd. · 2013