Apparatus for processing of leather
US-12416054-B2 · Sep 16, 2025 · US
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Mineral tanning
Mineral tanning · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C14C3/04 |
| Official title | Mineral tanning |
| Display label | Mineral tanning |
| Total patents | 13 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2017 | 1 |
| 2020 | 1 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 5 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of manufacturing a footwear
US-12232565-B2 · Feb 25, 2025 · US
Method for dyeing of leather
US-2024360524-A1 · Oct 31, 2024 · US
Chrome-free tanning process of ecological leather
US-12129524-B2 · Oct 29, 2024 · US
Apparatus and method for the treatment of a substrate with a multiplicity of solid particles
US-12060672-B2 · Aug 13, 2024 · US
Chrome-free tanning process of ecological leather
US-2024263257-A1 · Aug 8, 2024 · US
Method for dyeing and/or retanning of leather
US-12049676-B2 · Jul 30, 2024 · US
Automated footwear manufacturing line and method of operating such manufacturing line
US-2023092254-A1 · Mar 23, 2023 · US
Apparatus for processing of leather
US-2022220570-A1 · Jul 14, 2022 · US
Method for dyeing and/or retanning of leather
US-2022220571-A1 · Jul 14, 2022 · US
Method of manufacturing a footwear
US-2022132991-A1 · May 5, 2022 · US
Apparatus and method for the treatment of a substrate with a multiplicity of solid particles
US-2020378054-A1 · Dec 3, 2020 · US
Tanning of substrates using ionic liquids
US-2017029909-A1 · Feb 2, 2017 · US