A01N 33/12
Quaternary ammonium compounds
A01N33/12 (Quaternary ammonium compounds) appears on 920 US grants and 1,313 published applications in this corpus.
Search patents in A01N- Granted patents
- 920
- Published applications
- 1,313
- Assignees
- 641
- Inventors
- 2,623
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 9 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 9 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 12 | 0 |
| 1990 | 6 | 0 |
| 1991 | 11 | 0 |
| 1992 | 14 | 0 |
| 1993 | 8 | 0 |
| 1994 | 14 | 0 |
| 1995 | 16 | 0 |
| 1996 | 15 | 0 |
| 1997 | 12 | 0 |
| 1998 | 13 | 0 |
| 1999 | 17 | 0 |
| 2000 | 16 | 0 |
| 2001 | 13 | 6 |
| 2002 | 19 | 14 |
| 2003 | 11 | 22 |
| 2004 | 13 | 25 |
| 2005 | 8 | 27 |
| 2006 | 7 | 26 |
| 2007 | 12 | 26 |
| 2008 | 8 | 27 |
| 2009 | 8 | 33 |
| 2010 | 13 | 37 |
| 2011 | 14 | 41 |
| 2012 | 23 | 49 |
| 2013 | 22 | 59 |
| 2014 | 26 | 63 |
| 2015 | 43 | 42 |
| 2016 | 40 | 76 |
| 2017 | 47 | 73 |
| 2018 | 36 | 69 |
| 2019 | 47 | 85 |
| 2020 | 56 | 70 |
| 2021 | 46 | 82 |
| 2022 | 34 | 97 |
| 2023 | 49 | 72 |
| 2024 | 33 | 69 |
| 2025 | 35 | 73 |
| 2026 | 29 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Antiviral environment-friendly composite plating layer, preparation method therefor, and antiviral environment-friendly product6 Oct 2026US 12,751,456 B2Jomoo Kitchen&Bath Co., Ltd.
- Ionic liquids for transdermal drug delivery6 Oct 2026US 12,752,009 B2Arizona Board of Regents
- Antimicrobial composition comprising a polyimide29 Sep 2026US 12,745,769 B2The Procter & Gamble Company
- PPO formulations containing ether sulfates29 Sep 2026US 12,745,776 B2BASF SE
- Personal cleansing wand29 Sep 2026US 12,745,836 B2Silicon Valley Innovations, Inc.
- Bar composition having enhanced antimicrobial activity10 Sep 2026US 2026/0262635 A1Conopco, Inc., d/b/a UNILEVER
- Antimicrobial and antiviral, biologically active polymer composites effective against sars-cov-2 and other viral, bacterial and fungal targets, and related methods, materials, coatings and devices20 Aug 2026US 2026/0240166 A1
- Improved biocide compositions13 Aug 2026US 2026/0231947 A1Solugen, Inc.
- Silver ion complex gemini quaternary ammonium salt: preparation method and applications23 Jul 2026US 2026/0209253 A1Anhui Kiwi Biotech Co., Ltd
- Antimicrobial copolymers and methods of making and use thereof23 Jul 2026US 2026/0209437 A1Clearlab SG Pte Ltd.
Most cited
By later US patents
- Pressure-sensitive adhesive having a broad spectrum antimicrobial therein322US 4,310,509 AMinnesota Mining and Manufacturing Company · 1982
- Quaternized polymer for use as a cosmetic agent in cosmetic compositions for the hair and skin301US 4,217,914 AL'oreal · 1980
- Hair dyeing compositions containing quaternized polymer234US 4,422,853 AL'oreal · 1983
- Quaternized polymer for use as a cosmetic agent in cosmetic compositions for the hair and skin140US 5,196,189 ASociete Anonyme dite: L'Oreal · 1993
- Solid sanitizers and cleaner disinfectants135US 6,028,113 ASunburst Chemicals, Inc. · 2000