C07C 309/00
Sulfonic acids
Official title: Sulfonic acids; Halides, esters, or anhydrides thereof
C07C309/00 (Sulfonic acids) appears on 4,035 US grants and 3,181 published applications in this corpus.
Search patents in C07C- Granted patents
- 4,035
- Published applications
- 3,181
- Assignees
- 1,640
- Inventors
- 9,675
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 78 | 0 |
| 1977 | 57 | 0 |
| 1978 | 70 | 0 |
| 1979 | 59 | 0 |
| 1980 | 67 | 0 |
| 1981 | 68 | 0 |
| 1982 | 57 | 0 |
| 1983 | 50 | 0 |
| 1984 | 78 | 0 |
| 1985 | 70 | 0 |
| 1986 | 62 | 0 |
| 1987 | 79 | 0 |
| 1988 | 72 | 0 |
| 1989 | 72 | 0 |
| 1990 | 56 | 0 |
| 1991 | 69 | 0 |
| 1992 | 53 | 0 |
| 1993 | 80 | 0 |
| 1994 | 54 | 0 |
| 1995 | 67 | 0 |
| 1996 | 84 | 0 |
| 1997 | 85 | 0 |
| 1998 | 82 | 0 |
| 1999 | 63 | 0 |
| 2000 | 50 | 0 |
| 2001 | 72 | 18 |
| 2002 | 60 | 47 |
| 2003 | 60 | 70 |
| 2004 | 45 | 81 |
| 2005 | 38 | 75 |
| 2006 | 44 | 73 |
| 2007 | 41 | 97 |
| 2008 | 42 | 90 |
| 2009 | 66 | 116 |
| 2010 | 77 | 134 |
| 2011 | 84 | 148 |
| 2012 | 87 | 137 |
| 2013 | 112 | 164 |
| 2014 | 133 | 166 |
| 2015 | 179 | 139 |
| 2016 | 157 | 195 |
| 2017 | 143 | 161 |
| 2018 | 133 | 165 |
| 2019 | 128 | 142 |
| 2020 | 121 | 168 |
| 2021 | 103 | 141 |
| 2022 | 95 | 123 |
| 2023 | 97 | 170 |
| 2024 | 94 | 142 |
| 2025 | 82 | 116 |
| 2026 | 60 | 103 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Amorphous substances, crystals, pharmaceutical compositions, preparation methods and uses of thiohydantoin compound or pharmaceutically acceptable salt thereof6 Oct 2026US 12,753,173 B2Suzhou Kintor Pharmaceuticals, Inc.
- Magnesium sulfonate detergent having improved compatibility with friction modifiers6 Oct 2026US 12,753,362 B2Afton Chemical Corporation
- Process for making taurine22 Sep 2026US 12,741,935 B2Archer Daniels Midland Company
- Mining collectors15 Sep 2026US 12,734,529 B1
- Psilocybin analogs, salts, compositions, and methods of use15 Sep 2026US 12,735,386 B2Cybin IRL Limited
- Compounds and compositions for treating glucose hypometabolic disorders8 Oct 2026US 2026/0306523 A1Senovia Biosciences LLC
- Crystalline forms of 3-(5,7-difluoro-4-oxo-1,4-dihydroquinolin-2-yl)-4-(methylsulfonyl)benzonitrile8 Oct 2026US 2026/0308126 A1
- Salt and crystal form of anti-tumor heterocyclic compound8 Oct 2026US 2026/0308143 A1Cspc Zhongqi Pharmaceutical Technology (Shijiazhuang) Co., Ltd.
- Onium salt monomer, polymer, chemically amplified resist composition, and pattern forming process8 Oct 2026US 2026/0310075 A1Shin-Etsu Chemical Co., Ltd.
- Resist composition, resist pattern formation method, compound, and polymer compound8 Oct 2026US 2026/0310077 A1Tokyo Ohka Kogyo.Co., Ltd.
Most cited
By later US patents
- Reagent for detecting an analyte468US 7,892,748 B2Precisense A/S · 2011
- Reagent for detecting an analyte465US 8,318,443 B2Medtronic MiniMed, Inc. · 2012
- Photoactivatable water soluble cross-linking agents containing an onium group198US 5,714,360 ABSI Corporation · 1998
- Phenethanolamine derivatives172US 4,992,474 AGlaxo Group Limited · 1991
- Dichroic light polarizers162US 6,049,428 AOptiva, Inc. · 2000