C08F 8/36
Sulfonation
Official title: Sulfonation; Sulfation
C08F8/36 (Sulfonation) appears on 242 US grants and 202 published applications in this corpus.
Search patents in C08F- Granted patents
- 242
- Published applications
- 202
- Assignees
- 148
- Inventors
- 576
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 8 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 3 |
| 2002 | 7 | 6 |
| 2003 | 12 | 5 |
| 2004 | 5 | 7 |
| 2005 | 2 | 6 |
| 2006 | 4 | 6 |
| 2007 | 5 | 7 |
| 2008 | 4 | 5 |
| 2009 | 2 | 8 |
| 2010 | 3 | 15 |
| 2011 | 9 | 13 |
| 2012 | 12 | 12 |
| 2013 | 13 | 12 |
| 2014 | 4 | 3 |
| 2015 | 9 | 8 |
| 2016 | 9 | 13 |
| 2017 | 8 | 13 |
| 2018 | 12 | 8 |
| 2019 | 6 | 5 |
| 2020 | 5 | 10 |
| 2021 | 6 | 7 |
| 2022 | 6 | 7 |
| 2023 | 6 | 6 |
| 2024 | 2 | 4 |
| 2025 | 6 | 6 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Polymeric sorbents for aldehydes and methods of making1 Sep 2026US 12,722,139 B23M Innovative Properties Company
- Sulfonated polymers and compositions thereof26 May 2026US 12,637,532 B2Kraton Corporation
- Coating for medical devices14 Apr 2026US 12,599,707 B2Smart Reactors Service Limited
- Preparation method for admixture for plasterboard, admixture prepared thereby, and composition for forming plasterboard comprising same28 Oct 2025US 12,454,484 B2Silkroad C&T
- Method for preparing sulfur-polyacrylonitrile (SPAN)30 Sep 2025US 12,428,506 B2GM Global Technology Operations LLC
- Elastic sulfonated styrene diene block copolymers8 Oct 2026US 2026/0308343 A1Rensselaer Polytechnic Institute
- Binder comprising copolymer, negative electrode for secondary battery comprising binder, and secondary battery comprising negative electrode25 Jun 2026US 2026/0179954 A1Hansol Chemical Co., Ltd.
- Ionic polymers used as corrosion inhibitors in process streams in industrial systems and their method of obtaining18 Jun 2026US 2026/0167757 A1Instituto Mexicano Del Petroleo
- Block copolymer, method for producing a block copolymer, membrane, use of a membrane, and method for producing a membrane14 May 2026US 2026/0132264 A1Forschungszentrum Julich GmbH
- Ionically conductive polymeric binder for cathode26 Mar 2026US 2026/0088297 A1Belenos Clean Power Holding AG
Most cited
By later US patents
- Proton conducting polymers used as membranes200US 5,525,436 ACase Western Reserve University · 1996
- Polymeric microbeads and method of preparation110US 5,583,162 ABiopore Corporation · 1996
- Sulfonated block copolymers, method for making same, and various uses for such block copolymers100US 7,737,224 B2KRATON Polymers U. S. LLC · 2010
- Polymeric microbeads81US 5,863,957 ABiopore Corporation · 1999
- Polymeric microbeads and method of preparation78US 5,653,922 ABiopore Corporation · 1997