C07D 213/20
Quaternary compounds thereof
C07D213/20 (Quaternary compounds thereof) appears on 304 US grants and 162 published applications in this corpus.
Search patents in C07D- Granted patents
- 304
- Published applications
- 162
- Assignees
- 187
- Inventors
- 756
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 16 | 0 |
| 1978 | 10 | 0 |
| 1979 | 10 | 0 |
| 1980 | 13 | 0 |
| 1981 | 8 | 0 |
| 1982 | 7 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 11 | 0 |
| 1990 | 5 | 0 |
| 1991 | 14 | 0 |
| 1992 | 11 | 0 |
| 1993 | 11 | 0 |
| 1994 | 3 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 6 | 4 |
| 2003 | 4 | 2 |
| 2004 | 4 | 10 |
| 2005 | 4 | 9 |
| 2006 | 1 | 10 |
| 2007 | 2 | 5 |
| 2008 | 3 | 13 |
| 2009 | 5 | 12 |
| 2010 | 9 | 8 |
| 2011 | 10 | 13 |
| 2012 | 10 | 6 |
| 2013 | 10 | 5 |
| 2014 | 9 | 9 |
| 2015 | 4 | 11 |
| 2016 | 3 | 5 |
| 2017 | 3 | 5 |
| 2018 | 3 | 5 |
| 2019 | 4 | 4 |
| 2020 | 5 | 4 |
| 2021 | 3 | 3 |
| 2022 | 3 | 4 |
| 2023 | 3 | 5 |
| 2024 | 1 | 4 |
| 2025 | 5 | 2 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cannabinoid sulfate esters, their salts and uses thereof16 Jun 2026US 12,655,094 B2London Pharmaceuticals and Research Corporation
- Corrosion inhibitor formulations based on compounds with both pyridinium and hydroxy substituents31 Mar 2026US 12,590,256 B2Saudi Arabian Oil Company
- Mitochondria-targeted isoketal/isolevuglandin scavengers and uses thereof3 Mar 2026US 12,564,580 B2Vanderbilt University
- Odorless thiols for permanent waving, straightening and depilatory applications26 Aug 2025US 12,398,104 B2The Procter & Gamble Company
- 1-(2-(substituted phenyl)-2-oxoethyl)-4-methylpyridin-1-ium bromide as anti-tubercular agents18 Feb 2025US 12,227,480 B1King Faisal University
- Thermal acid generators, coating compositions, and pattern formation methods20 Aug 2026US 2026/0244096 A1
- Mitochondria-targeted isoketal/isolevuglandin scavengers and uses thereof16 Jul 2026US 2026/0199307 A1Vanderbilt University
- Pyridinium salts-based chemicals that include sulfur9 Jul 2026US 2026/0193186 A1Saudi Arabian Oil Company
- Compositions and methods for protein labeling, modification, analysis, and targeted delivery22 May 2025US 2025/0162975 A1University of Massachusetts
- Pyridinium Compounds With Low Reduction Potentials And Persistent Radical States30 Jan 2025US 2025/0034092 A1Board of Trustees of Michigan State University
Most cited
By later US patents
- Modulators of ATP-binding cassette transporters157US 7,495,103 B2Vertex Pharmaceuticals Incorporated · 2009
- Modulators of ATP-binding cassette transporters105US 8,101,767 B2Vertex Pharmaceuticals Incorporated · 2012
- Quaternary amine containing ether or ester lipid derivatives and therapeutic compositions103US 5,614,548 AWake Forest University · 1997
- Modulators of ATP-binding cassette transporters97US 8,324,242 B2Vertex Pharmaceutical Incorporated · 2012
- Modulators of ATP-binding cassette transporters95US 8,354,427 B2Vertex Pharmaceutical Incorporated · 2013