C07C 301/00
Esters of sulfurous acid
Official title: Esters of sulfurous acid (cyclic esters C07D)
C07C301/00 (Esters of sulfurous acid) appears on 23 US grants and 28 published applications in this corpus.
Search patents in C07C- Granted patents
- 23
- Published applications
- 28
- Assignees
- 21
- Inventors
- 97
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 4 |
| 2018 | 1 | 0 |
| 2019 | 0 | 4 |
| 2020 | 1 | 1 |
| 2021 | 2 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 7 |
| 2024 | 2 | 1 |
| 2025 | 3 | 5 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ophthalmic devices2 Sep 2025US 12,405,488 B2Bausch + Lomb Ireland Limited
- Fluorinated electrolyte additives5 Aug 2025US 12,381,258 B2E3Trigen, Inc.
- Gamma-hydroxybutyrate delivering compounds and processes for making and using them18 Mar 2025US 12,251,445 B2Zevra Therapeutics, Inc.
- Biomolecule-polymer-pharmaceutical agent conjugates for delivering the pharmaceutical agent10 Sep 2024US 12,084,415 B2Massachusetts Institute of Technology
- Recrystallized HI-6 dimethylsulfate21 May 2024US 11,986,779 B2Southwest Research Institute
- Chiral isomeric sulfite compound and application thereof2 Jul 2026US 2026/0184675 A1Chengdu Hanova BioSciences Co., Ltd
- Gamma-hydroxybutyrate delivering compounds and processes for making and using them4 Dec 2025US 2025/0367299 A1Zevra Therapeutics, Inc.
- Fluorinated electrolyte additives16 Oct 2025US 2025/0323319 A1E3Trigen, Inc.
- Ophthalmic devices25 Sep 2025US 2025/0298263 A1Bausch + Lomb Ireland Limited
- Biomolecule-polymer-pharmaceutical agent conjugates for delivering the pharmaceutical agent31 Jul 2025US 2025/0243159 A9Massachusetts Institute of Technology
Most cited
By later US patents
- Amino-benzocycloalkane derivatives63US 6,197,798 B1Novartis AG · 2001
- Phenol phosphorus compounds as polyolefin stabilizers6US 4,246,170 ACiba-Geigy Corporation · 1981
- Polysulfonated fluorescence dyes5US 11,180,657 B2ATTO-TEC GmbH · 2021
- Process for the preparation of optically active 2-chloropropionic acid esters3US 4,408,068 AHoechst Aktiengesellschaft · 1983
- Method for producing alkanesulfonic acids3US 6,495,714 B1BASF SE · 2002