A61K 31/14
Quaternary ammonium compounds
Official title: Quaternary ammonium compounds, e.g. edrophonium, choline (betaines A61K31/205)
A61K31/14 (Quaternary ammonium compounds) appears on 862 US grants and 1,359 published applications in this corpus.
Search patents in A61K- Granted patents
- 862
- Published applications
- 1,359
- Assignees
- 695
- Inventors
- 2,246
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 14 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 8 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 14 | 0 |
| 1998 | 13 | 0 |
| 1999 | 5 | 0 |
| 2000 | 14 | 0 |
| 2001 | 11 | 2 |
| 2002 | 22 | 24 |
| 2003 | 17 | 23 |
| 2004 | 6 | 21 |
| 2005 | 5 | 43 |
| 2006 | 11 | 39 |
| 2007 | 6 | 25 |
| 2008 | 9 | 20 |
| 2009 | 9 | 27 |
| 2010 | 12 | 44 |
| 2011 | 17 | 46 |
| 2012 | 18 | 48 |
| 2013 | 36 | 45 |
| 2014 | 42 | 66 |
| 2015 | 38 | 69 |
| 2016 | 50 | 88 |
| 2017 | 46 | 76 |
| 2018 | 31 | 69 |
| 2019 | 33 | 78 |
| 2020 | 41 | 87 |
| 2021 | 33 | 88 |
| 2022 | 60 | 78 |
| 2023 | 54 | 99 |
| 2024 | 34 | 66 |
| 2025 | 44 | 48 |
| 2026 | 24 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Topical anaesthetic composition having improved vasoconstrictor stability6 Oct 2026US 12,751,946 B2Animal Ethics Pty Ltd
- Methods for identifying pre-disposition to cognitive decline and agents for reducing or preventing cognitive decline, or improving cognitive ability29 Sep 2026US 12,746,255 B2Societe des Produits Nestle S. A.
- Short conjugated oligoelectrolytesand antibiotics22 Sep 2026US 12,740,950 B2Nanyang Technological University
- Ionic nanovesicle suspension and biocide prepared therefrom28 Jul 2026US 12,691,176 B2
- Nutritional compositions and infant formula for promoting de novo myealination21 Jul 2026US 12,685,331 B2Societe des Produits Nestle S. A.
- Sulfurized imidazoles in ophthalmic formulations8 Oct 2026US 2026/0306457 A1Geneiii Biotech Company Ltd.
- Compositions and compounds including lithium orotate1 Oct 2026US 2026/0294962 A1Atlantis Software Company
- Pharmaceutical compositions for wound care24 Sep 2026US 2026/0283983 A1Bio Protectant Technologies, Inc.
- Benzalkonium chloride for use in treating conjunctivitis and/or covid-1924 Sep 2026US 2026/0283984 A1Bausch + Lomb Ireland Limited
- Lipid emulsion for parenteral administration17 Sep 2026US 2026/0272824 A1Fresenius Kabi Deutschland GmbH
Most cited
By later US patents
- Encapsulated and non-encapsulated nitric oxide generators used as antimicrobial agents237US 5,814,666 AEntreMed, Inc. · 1998
- Topical administration of catecholamines and related compounds to subcutaneous muscle tissue using percutaneous penetration enhancers164US 5,879,690 A1999
- Transfection reagents155US 7,479,573 B2Invitrogen Corporation · 2009
- Undenatured virus-free biologically active protein derivatives141US 4,540,573 ANew York Blood Center, Inc. · 1985
- Blood coagulation factors and process for their manufacture135US 4,297,344 ABehringwerke Aktiengesellschaft · 1981