Hollow particles, method for producing hollow particles, resin compositon, and molded body
US-2024416313-A1 · Dec 19, 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 | C08F2/34 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 779 |
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 | 33 |
| 2016 | 49 |
| 2017 | 50 |
| 2018 | 84 |
| 2019 | 101 |
| 2020 | 109 |
| 2021 | 106 |
| 2022 | 68 |
| 2023 | 66 |
| 2024 | 63 |
| 2025 | 39 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods for improving production in gas phase polymerization
US-12152095-B2 · Nov 26, 2024 · US
Producing polyolefin products with improved stiffness, toughness, and processability
US-2016347886-A1 · Dec 1, 2016 · US
Process for polymerization in a fluidized bed reactor
US-2016347878-A1 · Dec 1, 2016 · US
Producing polyolefin products
US-2016347890-A1 · Dec 1, 2016 · US
Process for stopping and restarting polymerisation
US-9505919-B2 · Nov 29, 2016 · US
Controlling the placement of comonomer in an ethylene copolymer
US-2016340454-A1 · Nov 24, 2016 · US
Process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution
US-2016332140-A1 · Nov 17, 2016 · US
Scavenger injection
US-2016326293-A1 · Nov 10, 2016 · US
Process for separating components of a reaction mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers
US-2016311939-A1 · Oct 27, 2016 · US
Process
US-2016311953-A1 · Oct 27, 2016 · US
Process for transitioning
US-9469755-B2 · Oct 18, 2016 · US
Polymerisation process
US-2016297908-A1 · Oct 13, 2016 · US
Process for continuous polymerization of olefin monomers in a reactor
US-2016297899-A1 · Oct 13, 2016 · US
Process for treating polyolefin particles obtained by gas-phase polymerization
US-9458259-B2 · Oct 4, 2016 · US
High-pressure polymerization process of ethylenically unsaturated monomers in a tubular reactor
US-9441057-B1 · Sep 13, 2016 · US
Catalyst composition for olefin polymerization and application of same
US-2016244538-A1 · Aug 25, 2016 · US
Recycle gas cooler systems for gas-phase polymerization processes
US-9410001-B2 · Aug 9, 2016 · US
Method and apparatus for producing polymer and method and apparatus for producing organic film
US-2016215391-A1 · Jul 28, 2016 · US
Monomer/diluent recovery
US-9394383-B2 · Jul 19, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08F2/34?
- CPC C08F2/34 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C08F2/34 (Chemistry & Metallurgy)?
- Our database includes 779 publications tagged with this CPC code.
- Is patent activity under CPC C08F2/34 growing?
- Publication counts under this code: 63 in 2024 vs 39 in 2025 (latest complete years).