C07C 211/62
Quaternary ammonium compounds
C07C211/62 (Quaternary ammonium compounds) appears on 462 US grants and 502 published applications in this corpus.
Search patents in C07C- Granted patents
- 462
- Published applications
- 502
- Assignees
- 353
- Inventors
- 1,364
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 8 | 0 |
| 1990 | 0 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 10 | 0 |
| 1994 | 8 | 0 |
| 1995 | 15 | 0 |
| 1996 | 6 | 0 |
| 1997 | 11 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 10 | 9 |
| 2003 | 10 | 8 |
| 2004 | 5 | 15 |
| 2005 | 7 | 16 |
| 2006 | 8 | 11 |
| 2007 | 10 | 9 |
| 2008 | 8 | 15 |
| 2009 | 7 | 11 |
| 2010 | 13 | 21 |
| 2011 | 13 | 14 |
| 2012 | 10 | 16 |
| 2013 | 12 | 12 |
| 2014 | 14 | 16 |
| 2015 | 21 | 31 |
| 2016 | 11 | 29 |
| 2017 | 23 | 34 |
| 2018 | 24 | 23 |
| 2019 | 25 | 46 |
| 2020 | 33 | 35 |
| 2021 | 23 | 21 |
| 2022 | 18 | 30 |
| 2023 | 23 | 26 |
| 2024 | 16 | 23 |
| 2025 | 18 | 17 |
| 2026 | 4 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inhibitor for RuO4 gas generation and method for inhibiting RuO4 gas generation22 Sep 2026US 12,741,925 B2Tokuyama Corporation
- Onium salt, resist composition, and patterning process4 Aug 2026US 12,699,318 B2Shin-Etsu Chemical Co., Ltd.
- Particulate laundry softening and freshening wash additive comprising perfume particles and softening particles28 Jul 2026US 12,692,458 B2The Procter & Gamble Company
- Fluorine-containing alkyl ammonium borate compound and method for producing same14 Apr 2026US 12,600,805 B2AGC Inc.
- Organic proton-type ionic liquid, two-dimensional perovskite pure-phase quantum well film, preparation method and use thereof9 Dec 2025US 12,492,161 B2Nanjing Tech University
- Treatment of signs, symptoms and/or complications of viral, bacterial, protozoal, and/or fungal infections by high penetration prodrugs27 Aug 2026US 2026/0248922 A1Techfields Inc.
- Alkali metal ion conductor, alkali metal ion battery, and method for manufacturing alkali metal ion conductor27 Aug 2026US 2026/0253974 A1Toyota Jidosha Kabushiki Kaisha
- Thermal acid generators, coating compositions, and pattern formation methods20 Aug 2026US 2026/0244096 A1
- Onium cation with ether linkages for zinc batteries20 Aug 2026US 2026/0245979 A1U.S. Government as represented by the Secretary of the Army
- Cationic Polymers And Methods Of Making Same, And Uses Thereof13 Aug 2026US 2026/0233214 A1Carnegie Mellon University
Most cited
By later US patents
- Amperometric sensor194US 7,135,100 B1Drew Scientific Ventures LLC · 2006
- Transfection reagents155US 7,479,573 B2Invitrogen Corporation · 2009
- Highly packed polycationic ammonium, sulfonium and phosphonium lipids89US 5,674,908 ALife Technologies Corporation · 1997
- Quaternary amine surfactants and methods of using same in isolation of RNA88US 5,728,822 AQiagen GmbH · 1998
- Materials useful as electrolytic solutes83US 6,365,301 B1ACEP Inc. · 2002