C07C 2531/025
Sulfonic acids
C07C2531/025 (Sulfonic acids) appears on 170 US grants and 51 published applications in this corpus.
Search patents in C07C- Granted patents
- 170
- Published applications
- 51
- Assignees
- 80
- Inventors
- 334
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 8 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 8 | 0 |
| 1994 | 9 | 0 |
| 1995 | 8 | 0 |
| 1996 | 4 | 0 |
| 1997 | 10 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 2 |
| 2003 | 2 | 2 |
| 2004 | 1 | 3 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 7 |
| 2008 | 1 | 1 |
| 2009 | 1 | 3 |
| 2010 | 2 | 2 |
| 2011 | 1 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 2 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 3 | 1 |
| 2018 | 1 | 4 |
| 2019 | 2 | 1 |
| 2020 | 1 | 3 |
| 2021 | 2 | 1 |
| 2022 | 0 | 6 |
| 2023 | 6 | 2 |
| 2024 | 2 | 2 |
| 2025 | 4 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for separating 2-alkylanthracenes and use thereof for producing hydrogen peroxide19 Aug 2025US 12,391,633 B2China Petroleum & Chemical Corporation
- Method for producing 1,4-dimethyltetralin15 Apr 2025US 12,275,680 B2Sato Planning Co., Ltd
- Processes for the preparation of alkylbenzenes4 Mar 2025US 12,240,792 B2Univeristy of Kansas
- Method for producing 1,4-dimethylnaphthalene4 Mar 2025US 12,240,805 B2Sato Planning Co., Ltd
- Dimerization and trimerization of C5 olefins via catalytic distillation10 Dec 2024US 12,162,814 B2Lummus Technology Inc.
- Method for producing 1,4-dimethylnaphthalene11 Jul 2024US 2024/0228406 A1Sato Planning Co., Ltd
- Method for producing 1,4-dimethyltetralin11 Jul 2024US 2024/0228408 A1Sato Planning Co., Ltd
- Processes for the preparation of alkylbenzenes12 Oct 2023US 2023/0322646 A1University of Kansas
- Process for isomerizing isobutane15 Jun 2023US 2023/0183152 A1Uop LLC
- Alkylation catalyst composition and related methods29 Dec 2022US 2022/0410134 A1University of Kansas
Most cited
By later US patents
- Condensation of natural gas or methane into gasoline range hydrocarbons49US 4,513,164 A1985
- Electrical insulating oil and oil-filled electrical appliances49US 4,543,207 ANippon Petrochemicals Company, Limited · 1985
- Oligomerization to alpha-olefins47US 4,689,437 AUnion Carbide Corporation · 1987
- Condensation of natural gas or methane into gasoline-range hydrocarbons40US 4,467,130 A1984
- Alkylation process40US 5,220,095 AHaldor Topsoe A/S · 1993