C14C 3/20
Sulfonated
Official title: sulfonated
C14C3/20 (Sulfonated) appears on 30 US grants and 27 published applications in this corpus.
Search patents in C14C- Granted patents
- 30
- Published applications
- 27
- Assignees
- 25
- Inventors
- 129
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 4 |
| 2005 | 2 | 0 |
| 2006 | 2 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 1 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Use of epoxidized vegetable oils as tanning agents29 Sep 2026US 12,747,482 B2Workem S.R.L. Unipersonale
- Process for tanning leathers, pre-tanning products and use thereof18 Mar 2025US 12,252,752 B2Silvateam S.P.A.
- Method of manufacturing leather10 Dec 2024US 12,163,197 B2Midori Auto Leather Co., Ltd.
- Solid, particulate tanning agent preparations22 Dec 2020US 10,870,896 B2LANXESS Deutschland GmbH
- Tanning composition and method based on an acetal of an aldehydic tanning agent27 Oct 2020US 10,815,542 B2TFL Ledertechnik GmbH
- Leather or retanning compound with cyclodextrin based inclusion compound10 Apr 2025US 2025/0115970 A1BI-QEM PTE Ltd
- Use Of Epoxidized Vegetable Oils As Tanning Agents2 Jan 2025US 2025/0003019 A1Workem S.R.L. Unipersonale
- Modified polylactones useful for fatliquoring6 Jun 2024US 2024/0182636 A1TFL Ledertechnik GmbH
- Process for tanning leathers, pre-tanning products and use thereof22 Sep 2022US 2022/0298590 A1Silvateam S.P.A.
- Method of manufacturing leather4 Aug 2022US 2022/0243292 A1Midori Auto Leather Co., Ltd.
Most cited
By later US patents
- Interpolymers of unsaturated carboxylic acids and unsaturated sulfur acids37US 6,207,780 B1Rohm and Haas Company · 2001
- Phenol-formaldehyde condensates, their preparation and their use as dispersing agents, liquefaction agents and tanning agents20US 4,325,890 ABayer Aktiengesellschaft · 1982
- Recycling of cured aminoplast resins12US 5,382,476 ABASF SE · 1995
- Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases, and formaldehyde, and their use as tanning agents and as spraying aids for redispersible polymer powders10US 5,342,916 ABASF SE · 1994
- Reaction products of phenolsulphonic acid-urea-formaldehyde as tanning agents and process for their manufacture9US 4,009,996 ACiba-Geigy Corporation · 1977