C14C 3/32
Recovering tanning agents from leather
C14C3/32 (Recovering tanning agents from leather) appears on 14 US grants and 11 published applications in this corpus.
Search patents in C14C- Granted patents
- 14
- Published applications
- 11
- Assignees
- 8
- Inventors
- 24
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 2 | 2 |
| 2018 | 0 | 1 |
| 2019 | 3 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Apparatus for processing of leather16 Sep 2025US 12,416,054 B2ECCO Sko A/S
- NPK liquid and solid fertilizer, obtaining process, fertilizing compositions and use5 Aug 2025US 12,378,167 B2Fertilitatis Innovatio Pesquisas Ltda
- Tannery process with effluent recycling22 Jun 2021US 11,040,890 B2
- Tannery process with effluent recycling10 Dec 2019US 10,501,336 B2
- Leather production using waste liquids16 Apr 2019US 10,260,115 B2
- Npk liquid and solid fertilizer, obtaining process, fertilizing compositions and use28 Mar 2024US 2024/0101490 A1Fertilitatis Innovatio Pesquisas Ltda
- Apparatus for processing of leather14 Jul 2022US 2022/0220570 A1ECCO Sko A/S
- Tannery Process With Effluent Recycling16 Apr 2020US 2020/0115253 A1
- Tannery Process With Effluent Recycling10 May 2018US 2018/0127285 A1
- Leather Production Using Waste Liquids17 Aug 2017US 2017/0233833 A1
Most cited
By later US patents
- Process for recovering proteins and chromium from chrome-tanning waste10US 4,483,829 A1984
- Recovery of chromium from tannery waste7US 4,086,319 A1978
- Process for chrome recovery from industrial waste and the like, as from chrome-ladened tannery waste, including pollution control of the same6US 4,215,989 ASaco Tanning Division of Kirstein Leather Co. · 1980
- Enzymatic processing of materials containing chromium and protein4US 5,271,912 AThe United States of America as represented by the Secretary of Agriculture · 1993
- Apparatus for processing of leather1US 12,416,054 B2ECCO Sko A/S · 2025