C08K 5/19
Quaternary ammonium compounds
C08K5/19 (Quaternary ammonium compounds) appears on 592 US grants and 608 published applications in this corpus.
Search patents in C08K- Granted patents
- 592
- Published applications
- 608
- Assignees
- 460
- Inventors
- 1,899
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 4 | 0 |
| 1983 | 11 | 0 |
| 1984 | 10 | 0 |
| 1985 | 5 | 0 |
| 1986 | 10 | 0 |
| 1987 | 8 | 0 |
| 1988 | 2 | 0 |
| 1989 | 12 | 0 |
| 1990 | 16 | 0 |
| 1991 | 12 | 0 |
| 1992 | 12 | 0 |
| 1993 | 15 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 1 |
| 2002 | 8 | 3 |
| 2003 | 4 | 5 |
| 2004 | 5 | 12 |
| 2005 | 3 | 10 |
| 2006 | 6 | 17 |
| 2007 | 5 | 16 |
| 2008 | 7 | 21 |
| 2009 | 9 | 25 |
| 2010 | 13 | 15 |
| 2011 | 14 | 23 |
| 2012 | 12 | 18 |
| 2013 | 16 | 21 |
| 2014 | 14 | 18 |
| 2015 | 23 | 33 |
| 2016 | 19 | 23 |
| 2017 | 19 | 28 |
| 2018 | 23 | 34 |
| 2019 | 20 | 48 |
| 2020 | 29 | 32 |
| 2021 | 26 | 43 |
| 2022 | 23 | 51 |
| 2023 | 32 | 34 |
| 2024 | 31 | 39 |
| 2025 | 18 | 22 |
| 2026 | 16 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Antimicrobial paint composition22 Sep 2026US 12,742,074 B2Kraton Corporation
- Method for producing a plastic object with embedded quaternary salts4 Aug 2026US 12,698,366 B2Research Foundation of the City University of New York
- Inorganic fiber sizing agent and inorganic fibers4 Aug 2026US 12,698,588 B2Takemoto Oil & Fat Co., Ltd.
- Hydrogel composition28 Jul 2026US 12,692,371 B2Tronjen Medical Technology Inc.
- Clear coating antimicrobial compositions, methods of preparation, and uses thereof for conferring antimicrobial activity to a surface23 Jun 2026US 12,662,601 B2Polyamyna Nanotech Inc.
- Manufacturing method of polyethylene furandicarboxylate8 Oct 2026US 2026/0308316 A1Nan Ya Plastics Corporation
- Transparent pvdf with service temperature over the melting point17 Sep 2026US 2026/0275008 A1Arkema Inc.
- Reactive gel material for sustained water-based reactions20 Aug 2026US 2026/0242632 A1
- A re-dispersible bacterial cellulose powder16 Jul 2026US 2026/0199216 A1Cellugy Aps
- Advanced Hybrid Eutecto Gels for Water Purification16 Jul 2026US 2026/0200760 A1
Most cited
By later US patents
- Anionically modified organophilic clays and their preparation103US 4,434,075 ANL Industries, Inc. · 1984
- Rubber composition comprising phyllosilicate minerals, silanes, and quaternary ammonium salts70US 4,431,755 AStandard Oil Company (Indiana) · 1984
- Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared thereby69US 5,753,730 AMitsui Toatsu Chemicals, Inc. · 1998
- Thermoplastic polyurethane anticoagulant alloy coating68US 4,678,660 ADeseret Medical, Inc. · 1987
- Thixotropic polyester compositions containing an organophilic clay gellant54US 4,081,496 AN L Industries, Inc. · 1978