C07C 309/01
Sulfonic acids
C07C309/01 (Sulfonic acids) appears on 2,256 US grants and 2,363 published applications in this corpus.
Search patents in C07C- Granted patents
- 2,256
- Published applications
- 2,363
- Assignees
- 1,127
- Inventors
- 5,884
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 10 | 0 |
| 1978 | 16 | 0 |
| 1979 | 20 | 0 |
| 1980 | 24 | 0 |
| 1981 | 19 | 0 |
| 1982 | 11 | 0 |
| 1983 | 10 | 0 |
| 1984 | 15 | 0 |
| 1985 | 10 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 15 | 0 |
| 1990 | 16 | 0 |
| 1991 | 25 | 0 |
| 1992 | 26 | 0 |
| 1993 | 43 | 0 |
| 1994 | 20 | 0 |
| 1995 | 27 | 0 |
| 1996 | 40 | 0 |
| 1997 | 38 | 0 |
| 1998 | 48 | 0 |
| 1999 | 42 | 0 |
| 2000 | 29 | 0 |
| 2001 | 37 | 6 |
| 2002 | 25 | 27 |
| 2003 | 24 | 29 |
| 2004 | 17 | 37 |
| 2005 | 18 | 47 |
| 2006 | 21 | 41 |
| 2007 | 19 | 60 |
| 2008 | 29 | 65 |
| 2009 | 39 | 66 |
| 2010 | 51 | 85 |
| 2011 | 59 | 99 |
| 2012 | 59 | 99 |
| 2013 | 77 | 127 |
| 2014 | 102 | 119 |
| 2015 | 140 | 109 |
| 2016 | 110 | 147 |
| 2017 | 117 | 132 |
| 2018 | 102 | 133 |
| 2019 | 100 | 117 |
| 2020 | 99 | 134 |
| 2021 | 83 | 117 |
| 2022 | 84 | 107 |
| 2023 | 82 | 143 |
| 2024 | 82 | 126 |
| 2025 | 69 | 106 |
| 2026 | 50 | 85 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C07C 309/02Having sulfo groups bound to acyclic carbon atoms1,393
- C07C 309/28Having sulfo groups bound to carbon atoms of six-membered aromatic rings of976
- C07C 309/25Having sulfo groups bound to carbon atoms of rings other than six-membered87
- C07C 309/62Sulfonated fats, oils or waxes of undetermined constitution26
Recent patents
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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
- Dichroic light polarizers162US 6,049,428 AOptiva, Inc. · 2000
- Compositions for oral delivery of active agents159US 5,650,386 AEmisphere Technologies, Inc. · 1997