C07C 50/16
The quinoid structure being part of a condensed ring system containing three
Official title: the quinoid structure being part of a condensed ring system containing three rings
C07C50/16 (The quinoid structure being part of a condensed ring system containing three) appears on 26 US grants and 15 published applications in this corpus.
Search patents in C07C- Granted patents
- 26
- Published applications
- 15
- Assignees
- 24
- Inventors
- 80
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
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| 1979 | 1 | 0 |
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| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
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| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 2 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Electroactive species and method for electrochemical gas separation4 Nov 2025US 12,458,922 B2Verdox, Inc.
- Senna obtusifolia seed extract and a method for comprehensive development and utilization of Senna obtusifolia seeds23 May 2023US 11,654,378 B2Henan Zhongda Hengyuan Biotechnology Stock Co., Ltd.
- Medicinal use of serrulatane diterpenes17 May 2022US 11,331,299 B2Kynan Duke IP, LLC
- Conductive surface coating based on modified and unmodified particles and method of preparation thereof6 Jul 2021US 11,056,250 B1University of New Brunswick
- Medicinal use of serrulatane diterpenes9 Feb 2021US 10,912,742 B2The University of Sydney
- Charge transfer complex4 Apr 2024US 2024/0109869 A1Adeka Corporation
- Electroactive species and method for electrochemical gas separation19 Jan 2023US 2023/0012689 A1Verdox, Inc.
- Medicinal use of serrulatane diterpenes21 Apr 2022US 2022/0117930 A2The University of Sydney
- Senna obtusifolia seed extract and a method for comprehensive development and utilization of senna obtusifolia seeds30 Dec 2021US 2021/0402324 A1Henan Zhongda Hengyuan Biotechnology Stock Co., Ltd.
- Medicinal use of serrulatane diterpenes15 Jul 2021US 2021/0212982 A1The University of Sydney
Most cited
By later US patents
- Process for obtaining anthraquinodimethane derivatives and anthrone derivatives16US 4,606,861 AXerox Corporation · 1986
- Method for the delignification of wood pulp utilizing fused ring quinone compounds prepared from lignin or lignin derived substances15US 5,002,634 AInstitute of Paper Science and Technology, Inc. · 1991
- Method for preparing anthraquinones13US 5,723,675 AKorea Kumho Petrochemical Co., Ltd. · 1998
- Polycyclic aromatic ring cleavage (PARC) process10US 5,288,390 ASun Company, Inc. (R&M) · 1994
- Method of producing hydrogen peroxide and reaction promoters therefor9US 6,153,169 ADegussa-Huls AG · 2000