C08K 5/42
Sulfonic acids
Official title: Sulfonic acids; Derivatives thereof
C08K5/42 (Sulfonic acids) appears on 1,292 US grants and 1,358 published applications in this corpus.
Search patents in C08K- Granted patents
- 1,292
- Published applications
- 1,358
- Assignees
- 677
- Inventors
- 3,751
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 21 | 0 |
| 1978 | 29 | 0 |
| 1979 | 12 | 0 |
| 1980 | 17 | 0 |
| 1981 | 21 | 0 |
| 1982 | 9 | 0 |
| 1983 | 15 | 0 |
| 1984 | 24 | 0 |
| 1985 | 25 | 0 |
| 1986 | 18 | 0 |
| 1987 | 13 | 0 |
| 1988 | 8 | 0 |
| 1989 | 13 | 0 |
| 1990 | 12 | 0 |
| 1991 | 19 | 0 |
| 1992 | 19 | 0 |
| 1993 | 18 | 0 |
| 1994 | 18 | 0 |
| 1995 | 13 | 0 |
| 1996 | 15 | 0 |
| 1997 | 8 | 0 |
| 1998 | 12 | 0 |
| 1999 | 15 | 0 |
| 2000 | 12 | 0 |
| 2001 | 10 | 5 |
| 2002 | 16 | 15 |
| 2003 | 15 | 19 |
| 2004 | 19 | 30 |
| 2005 | 8 | 34 |
| 2006 | 16 | 35 |
| 2007 | 17 | 43 |
| 2008 | 18 | 34 |
| 2009 | 14 | 50 |
| 2010 | 30 | 47 |
| 2011 | 23 | 35 |
| 2012 | 26 | 49 |
| 2013 | 35 | 58 |
| 2014 | 44 | 76 |
| 2015 | 52 | 90 |
| 2016 | 58 | 82 |
| 2017 | 66 | 80 |
| 2018 | 54 | 63 |
| 2019 | 54 | 76 |
| 2020 | 52 | 74 |
| 2021 | 44 | 63 |
| 2022 | 50 | 86 |
| 2023 | 45 | 77 |
| 2024 | 45 | 53 |
| 2025 | 42 | 55 |
| 2026 | 31 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Release coating compositions and articles therefrom6 Oct 2026US 12,753,325 B23M Innovative Properties Company
- Resin composition and cured film29 Sep 2026US 12,747,344 B2Advanced Echem Materials Company Limited
- Water washable thermal and plasma resistant coating for laser interactive applications22 Sep 2026US 12,742,076 B2
- Matting polymer composition having excellent weather resistance and impact resistance, and matte sheet including the same11 Aug 2026US 12,703,766 B2Hannanotech Co., Ltd.
- Marine-biodegradation accelerator11 Aug 2026US 12,703,793 B2Nisshinbo Holdings Inc.
- Polycarbonate-based resin composition and molded article8 Oct 2026US 2026/0308318 A1Idemitsu Kosan Co., Ltd.
- Composition, polymer, cured product, molded body, and method for producing polymethyl methacrylate24 Sep 2026US 2026/0286016 A1Sumitomo Chemical Company, Limited
- Chlorosulfonated polyolefin latex17 Sep 2026US 2026/0275080 A1Sumitomo Seika Chemicals Co., Ltd.
- Hydrophilic copolymer and coating composition comprising the same and antifog use thereof13 Aug 2026US 2026/0234430 A1Momentive Performance Materials Inc.
- Unit dose compositions, methods of making the unit dose compositions as a unified solid13 Aug 2026US 2026/0234513 A1Church & Dwight Co., Inc.
Most cited
By later US patents
- Oily mist resistant electret filter media and method for filtering148US 5,411,576 AMinnesota Mining and Manufacturing Company · 1995
- Polymer composition having delayed crystallization behavior, additive composition that influences the crystallization behavior, method for reducing the crystallization point and/or the crystallization speed, and use of an additive composition130US 10,138,354 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. · 2018
- Oily mist resistant electret filter media130US 5,472,481 AMinnesota Mining and Manufacturing Company · 1995
- Branched, high-molecular weight thermoplastic polycarbonates125US 4,185,009 ABayer Aktiengesellschaft · 1980
- Compositions containing basic metal salts and/or non-Newtonian colloidal disperse systems and vinyl aromatic containing polymers113US 4,728,578 AThe Lubrizol Corporation · 1988