C07C 303/02
Preparation of esters or amides of sulfuric acids: of sulfonic acids or
Official title: of sulfonic acids or halides thereof
C07C303/02 (Preparation of esters or amides of sulfuric acids: of sulfonic acids or) appears on 764 US grants and 576 published applications in this corpus.
Search patents in C07C- Granted patents
- 764
- Published applications
- 576
- Assignees
- 376
- Inventors
- 1,852
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 11 | 0 |
| 1978 | 10 | 0 |
| 1979 | 5 | 0 |
| 1980 | 11 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 15 | 0 |
| 1991 | 6 | 0 |
| 1992 | 12 | 0 |
| 1993 | 13 | 0 |
| 1994 | 14 | 0 |
| 1995 | 11 | 0 |
| 1996 | 22 | 0 |
| 1997 | 18 | 0 |
| 1998 | 15 | 0 |
| 1999 | 19 | 0 |
| 2000 | 22 | 0 |
| 2001 | 16 | 2 |
| 2002 | 18 | 12 |
| 2003 | 23 | 15 |
| 2004 | 10 | 21 |
| 2005 | 16 | 20 |
| 2006 | 11 | 21 |
| 2007 | 15 | 15 |
| 2008 | 9 | 13 |
| 2009 | 14 | 27 |
| 2010 | 10 | 19 |
| 2011 | 14 | 16 |
| 2012 | 15 | 21 |
| 2013 | 14 | 31 |
| 2014 | 19 | 23 |
| 2015 | 39 | 30 |
| 2016 | 28 | 36 |
| 2017 | 28 | 15 |
| 2018 | 18 | 29 |
| 2019 | 27 | 43 |
| 2020 | 32 | 28 |
| 2021 | 26 | 35 |
| 2022 | 26 | 32 |
| 2023 | 28 | 28 |
| 2024 | 24 | 16 |
| 2025 | 13 | 20 |
| 2026 | 10 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C07C 303/22From sulfonic acids, by reactions not involving the formation of sulfo or362
- C07C 303/04By substitution of hydrogen atoms by sulfo or halosulfonyl groups256
- C07C 303/16By oxidation of thiols, sulfides, hydropolysulfides, or polysulfides with formation of sulfo35
- C07C 303/20By addition of sulfurous acid or salts thereof to compounds having carbon-to-carbon29
- C07C 303/14By sulfoxidation, i.e. by reaction with sulfur dioxide and oxygen with formation22
- C07C 303/18By reaction of sulfides with compounds having functional groups with formation of20
Recent patents
- Method for the preparation of diarylmethane dyes and triarylmethane dyes including isosulfan blue22 Sep 2026US 12,741,934 B2Nj Bio, Inc.
- Process for the production of alkanesulfonic acids25 Aug 2026US 12,715,841 B2BASF SE
- Process for synthesizing sulfonated triaryl methane compounds30 Jun 2026US 12,668,570 B2Provepharm Life Solutions
- Recovery of water-free methanesulfonic acid from the bottom stream of a distillation column26 May 2026US 12,637,419 B2BASF SE
- Process for sulfonation of 2-aminoethanol hydrogen sulfate ester to produce taurine12 May 2026US 12,624,000 B2Archer Daniels Midland Company
- Composition of triarylmethane sulfone compounds1 Oct 2026US 2026/0297021 A1Provepharm Life Solutions
- Ammonium styrenesulfonate composition excellent in storage stability, and method for producing same17 Sep 2026US 2026/0274790 A1Sagami Chemical Research Institute
- An improved process for the preparation of intermediates used in the preparation of dasatinib20 Aug 2026US 2026/0242329 A1Ocimum Labs Private Limited
- Production of sustainable sulfonates through treatment of re-refined base oils13 Aug 2026US 2026/0234102 A1HollyFrontier LSP Brand Strategies LLC
- Process for sulfonation of 2-aminoethanol hydrogen sulfate ester to produce taurine18 Jun 2026US 2026/0167602 A1Archer Daniels Midland Company
Most cited
By later US patents
- Process for the production of surfactant mixtures based on ether sulfonates and their use126US 5,318,709 AHenkel Kommanditgesellschaft auf Aktien · 1994
- Preparation of perfluorinated vinyl ethers having a sulfonyl fluoride end-group109US 6,624,328 B13M Innovative Properties Company · 2003
- Process for the preparation of light-colored oleic acid sulfonates67US 5,294,726 AHenkel Kommanditgesellschaft auf Aktien · 1994
- Fluorination in tubular reactor system57US 5,488,142 AMinnesota Mining and Manufacturing Company · 1996
- Controlled reactant injection with permeable plates54US 6,749,817 B1Uop LLC · 2004