C07C 5/31
Changing the number of rings
Official title: changing the number of rings
C07C5/31 (Changing the number of rings) appears on 88 US grants and 51 published applications in this corpus.
Search patents in C07C- Granted patents
- 88
- Published applications
- 51
- Assignees
- 51
- Inventors
- 185
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 3 |
| 2005 | 0 | 2 |
| 2006 | 1 | 3 |
| 2007 | 0 | 2 |
| 2008 | 6 | 5 |
| 2009 | 3 | 2 |
| 2010 | 1 | 1 |
| 2011 | 2 | 1 |
| 2012 | 2 | 4 |
| 2013 | 1 | 5 |
| 2014 | 3 | 3 |
| 2015 | 2 | 4 |
| 2016 | 5 | 1 |
| 2017 | 3 | 2 |
| 2018 | 9 | 1 |
| 2019 | 2 | 2 |
| 2020 | 0 | 2 |
| 2021 | 1 | 0 |
| 2022 | 2 | 1 |
| 2023 | 1 | 3 |
| 2024 | 2 | 2 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing 1,4-dimethyltetralin15 Apr 2025US 12,275,680 B2Sato Planning Co., Ltd
- Method for producing limonene and composition containing limonene4 Feb 2025US 12,215,076 B2Symrise AG
- Process for preparing limonene and composition containing limonene30 Jul 2024US 12,049,441 B2Symrise AG
- Ruthenium-based metathesis catalysts, precursors for their preparation and their use5 Mar 2024US 11,918,985 B2Umicore AG & Co. KG
- Ruthenium-based metathesis catalysts, precursors for their preparation and their use14 Feb 2023US 11,577,232 B2Umicore AG & Co. KG
- Tribenzotriquinacene with axial aryl group and method for preparing the same7 Aug 2025US 2025/0250215 A1National Yang Ming.Chiao Tung University
- Method for producing 1,4-dimethyltetralin11 Jul 2024US 2024/0228408 A1Sato Planning Co., Ltd
- Ruthenium-based metathesis catalysts, precursors for their preparation and their use11 Apr 2024US 2024/0116039 A1Umicore AG & Co. KG
- Method for producing limonene and composition containing limonene1 Jun 2023US 2023/0167041 A1Symrise AG
- Ruthenium-based metathesis catalysts, precursors for their preparation and their use18 May 2023US 2023/0149911 A1Umicore AG & Co. KG
Most cited
By later US patents
- Perfume composition59US 4,434,306 ATakasago Perfumery Co., Ltd. · 1984
- Preparation of a dimethyltetralin in a distillation reactor50US 5,284,987 AAmoco Corporation · 1994
- Selective opening of five and six membered rings27US 5,811,624 AExxon Research & Engineering Co. · 1998
- Process for the conversion of terpenes to limonene23US 4,508,930 AThe Goodyear Tire & Rubber Company · 1985
- Process for selectively opening naphthenic rings22US 5,763,731 AExxon Research & Engineering Co. · 1998