Method of manufacturing leather
US-12163197-B2 · Dec 10, 2024 · US
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sulfonated
sulfonated · 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 | C14C3/20 |
| Official title | sulfonated |
| Display label | sulfonated |
| Total patents | 8 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2020 | 1 |
| 2022 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of manufacturing leather
US-2022243292-A1 · Aug 4, 2022 · US
Solid, particulate tanning agent preparations
US-10870896-B2 · Dec 22, 2020 · US
Sulfonatocalixarene tanning agent for leather tanning and preparation method therefor
US-9970069-B2 · May 15, 2018 · US
Sulfonatocalixarene tanning agent for leather tanning and preparation method therefor
US-2017137903-A1 · May 18, 2017 · US
Compositions comprising at least one compound containing a carbamoyl sulfonate group and use of the same as tanning agents
US-9376729-B2 · Jun 28, 2016 · US
Topcoat
US-9212403-B2 · Dec 15, 2015 · US
Condensation products based on bicyclic or polycyclic aromatics or heteroaromatics
US-8945610-B2 · Feb 3, 2015 · US