Additive for hydraulic compositions, and hydraulic composition using same
US-2024199490-A1 · Jun 20, 2024 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C01B32/225 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 254 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 31 |
| 2016 | 24 |
| 2017 | 22 |
| 2018 | 23 |
| 2019 | 26 |
| 2020 | 28 |
| 2021 | 28 |
| 2022 | 18 |
| 2023 | 18 |
| 2024 | 20 |
| 2025 | 10 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Graphite film
US-9776927-B2 · Oct 3, 2017 · US
Expanded-graphite sheet
US-2017174519-A1 · Jun 22, 2017 · US
Process for Unitary Graphene Layer or Graphene Single Crystal
US-2017073834-A1 · Mar 16, 2017 · US
Unitary graphene layer or graphene single crystal
US-9533889-B2 · Jan 3, 2017 · US
Capacitor electrode material, method for producing same, and electric double layer capacitor
US-2016358718-A1 · Dec 8, 2016 · US
Environmentally benign production of graphene materials
US-9481576-B2 · Nov 1, 2016 · US
Preparation of metal nanowire decorated carbon allotropes
US-9475973-B2 · Oct 25, 2016 · US
Production of graphene oxide
US-2016298244-A1 · Oct 13, 2016 · US
Composite material and method for producing same
US-9458295-B2 · Oct 4, 2016 · US
Environmentally benign production of graphene materials
US-2016244333-A1 · Aug 25, 2016 · US
Electrochemical method of producing nano graphene platelets
US-9422164-B2 · Aug 23, 2016 · US
Ultracapacitor with a novel carbon
US-9412484-B2 · Aug 9, 2016 · US
Method for producing graphite film
US-2016194250-A1 · Jul 7, 2016 · US
Method for exfoliating carbonaceaous materials containing graphite, assisted by a diels-alder reaction
US-2016194207-A1 · Jul 7, 2016 · US
Graphite film
US-2016194204-A1 · Jul 7, 2016 · US
Method for manufacturing exfoliated graphite derivative, and method for manufacturing exfoliated graphite-resin composite material
US-2016167969-A1 · Jun 16, 2016 · US
Production of graphene and graphane
US-2016168726-A1 · Jun 16, 2016 · US
Electrically conductive material
US-2016155528-A1 · Jun 2, 2016 · US
Intercalation electrode based on ordered graphene planes
US-9356281-B2 · May 31, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B32/225?
- CPC C01B32/225 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C01B32/225 (Chemistry & Metallurgy)?
- Our database includes 254 publications tagged with this CPC code.
- Is patent activity under CPC C01B32/225 growing?
- Publication counts under this code: 20 in 2024 vs 10 in 2025 (latest complete years).