C14C 3/04
Mineral tanning
C14C3/04 (Mineral tanning) appears on 107 US grants and 92 published applications in this corpus.
Search patents in C14C- Granted patents
- 107
- Published applications
- 92
- Assignees
- 69
- Inventors
- 309
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 6 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 6 |
| 2005 | 0 | 2 |
| 2006 | 2 | 2 |
| 2007 | 4 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 5 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 5 |
| 2013 | 1 | 5 |
| 2014 | 5 | 1 |
| 2015 | 2 | 7 |
| 2016 | 1 | 7 |
| 2017 | 4 | 7 |
| 2018 | 3 | 3 |
| 2019 | 7 | 5 |
| 2020 | 6 | 6 |
| 2021 | 3 | 3 |
| 2022 | 5 | 7 |
| 2023 | 2 | 6 |
| 2024 | 6 | 7 |
| 2025 | 3 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for the antimicrobial protection of hides during the tanning process which includes a biocidal composition and a luminescent additive allowing the identification thereof11 Aug 2026US 12,703,887 B2Ancor TecnolóGica Canaria, S.L.
- Process for tanning animal hide10 Feb 2026US 12,545,969 B2University of Lancaster
- Apparatus for processing of leather16 Sep 2025US 12,416,054 B2ECCO Sko A/S
- Hide sorting systems and methods1 Apr 2025US 12,264,372 B2National Beef Packing Company, LLC
- Method of manufacturing a footwear25 Feb 2025US 12,232,565 B2ECCO Sko A/S
- Grafted polymer of mono-unsaturated polycarboxylic acid as dyeing auxiliary or as re-tanning agent for leather9 Apr 2026US 2026/0098312 A1Stahl International B.V.
- Hide sorting systems and methods14 Aug 2025US 2025/0257414 A1National Beef Packing Company, LLC
- Method for the antimicrobial protection of hides during the tanning process which includes a biocidal composition and a luminescent additive allowing the identification thereof15 May 2025US 2025/0154613 A1Ancor TecnolóGica Canaria, S.L.
- Leather or retanning compound with cyclodextrin based inclusion compound10 Apr 2025US 2025/0115970 A1BI-QEM PTE Ltd
- Method for dyeing of leather31 Oct 2024US 2024/0360524 A1ECCO Sko A/S
Most cited
By later US patents
- Leather impregnated with temperature stabilizing material and method for producing such leather61US 6,179,879 B2Acushnet Company · 2001
- Method for treating a substrate made of animal fibers with solid particles and a chemical formulation comprising a colourant19US 9,845,516 B2Xeros Limited · 2017
- Ecofriendly bio-process for leather processing16US 6,708,531 B1Council of Scientific and Industrial Research · 2004
- Continuous method for reclaiming chromium hydroxide from spent chrome tanning liquors and re-use thereof in subsequent tanning15US 3,950,131 AHoffmann-Stafford Tanning Co. · 1976
- Surface-active compounds based on modified castor oil fatty substances15US 5,420,315 AHoechst Aktiengesellschaft · 1995