C07C 303/24
Preparation of esters or amides of sulfuric acids: of esters of sulfuric
Official title: of esters of sulfuric acids
C07C303/24 (Preparation of esters or amides of sulfuric acids: of esters of sulfuric) appears on 164 US grants and 114 published applications in this corpus.
Search patents in C07C- Granted patents
- 164
- Published applications
- 114
- Assignees
- 88
- Inventors
- 460
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 1 |
| 2002 | 4 | 5 |
| 2003 | 5 | 2 |
| 2004 | 3 | 5 |
| 2005 | 2 | 5 |
| 2006 | 3 | 3 |
| 2007 | 3 | 6 |
| 2008 | 7 | 5 |
| 2009 | 4 | 4 |
| 2010 | 1 | 3 |
| 2011 | 4 | 9 |
| 2012 | 4 | 1 |
| 2013 | 0 | 2 |
| 2014 | 5 | 6 |
| 2015 | 5 | 7 |
| 2016 | 1 | 4 |
| 2017 | 6 | 2 |
| 2018 | 5 | 7 |
| 2019 | 4 | 3 |
| 2020 | 3 | 3 |
| 2021 | 4 | 3 |
| 2022 | 3 | 5 |
| 2023 | 3 | 11 |
| 2024 | 2 | 3 |
| 2025 | 2 | 1 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for sulfonation of 2-aminoethanol hydrogen sulfate ester to produce taurine12 May 2026US 12,624,000 B2Archer Daniels Midland Company
- Higher secondary alcohol alkoxylate precursor, higher secondary alcohol alkoxylate adduct and higher secondary alkyl ether sulfate ester salt, and methods for producing these10 Mar 2026US 12,570,592 B2Nippon Shokubai Co., Ltd.
- Monomer for polymer gel, polymer gel and preparation therefor27 Jan 2026US 12,534,430 B2Soochow University
- Methanol and sulfuric acid co-production system16 Dec 2025US 12,496,533 B2Korea Institute of Science and Technology
- Efficient conversion of methane to methanesulfonic acid via trifluoroacetylsulfuric acid16 Dec 2025US 12,497,354 B2University of Southern California
- Process for sulfonation of 2-aminoethanol hydrogen sulfate ester to produce taurine18 Jun 2026US 2026/0167602 A1Archer Daniels Midland Company
- Liquid hand dishwashing composition11 Jun 2026US 2026/0159779 A1The Procter & Gamble Company
- Alkyl ether sulfate surfactants and associated methods of manufacture26 Mar 2026US 2026/0085037 A1
- Hand dishwashing detergent composition12 Mar 2026US 2026/0071138 A1The Procter & Gamble Company
- Process for making concentrated surfactant blends12 Mar 2026US 2026/0071139 A1The Procter & Gamble Company
Most cited
By later US patents
- Mid-chain branched surfactants193US 6,020,303 AThe Procter & Gamble Company · 2000
- Mid-chain branched alkyl sulfate surfactants175US 6,060,443 AThe Procter & Gamble Company · 2000
- Detergent compositions containing selected mid-chain branched surfactants167US 6,326,348 B1The Procter & Gamble Company · 2001
- Mid-Chain branched Alkoxylated Sulfate Surfactants147US 6,008,181 AThe Procter & Gamble Company · 1999
- Foaming agent composition and process91US 5,158,612 AHenkel Corporation · 1992