Isoprene polymerization catalyst composition, method for producing synthetic polyisoprene, and synthetic polyisoprene
US-2015368383-A1 · Dec 24, 2015 · 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 | C08F4/52 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 504 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 66 |
| 2016 | 39 |
| 2017 | 36 |
| 2018 | 31 |
| 2019 | 41 |
| 2020 | 66 |
| 2021 | 50 |
| 2022 | 63 |
| 2023 | 50 |
| 2024 | 28 |
| 2025 | 29 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for ethylene oligomerization
US-9206272-B2 · Dec 8, 2015 · US
Solid catalyst component for olefin polymerization, catalyst for olefin polymerization, and method for producing olefin polymer
US-9206265-B2 · Dec 8, 2015 · US
Oxo-nitrogenated complex of lanthanides, catalytic system comprising said oxo-nitrogenated complex and process for the (co)polymerization of conjugated dienes
US-9200101-B2 · Dec 1, 2015 · US
Polymerization method using surfactant-containing particle
US-9200093-B2 · Dec 1, 2015 · US
Vinyl Terminated Polyethylene with Long Chain Branching
US-2015337058-A1 · Nov 26, 2015 · US
Polyethylene based resin, producing catalyst for the same, method for producing the same, hollow plastic molded article containing polyethylene based resin, and use of the same
US-9193809-B2 · Nov 24, 2015 · US
Method of production of ethylene-based polymer particles and stretch-molded article obtained from ethylene-based polymer particles
US-9181359-B2 · Nov 10, 2015 · US
Multicomponent catalytic system, process for preparing same and isoprene polymerization process using same
US-2015315312-A1 · Nov 5, 2015 · US
Activating supports
US-9175106-B2 · Nov 3, 2015 · US
Process for making a solid catalyst component for ethylene polymerization and copolymerization
US-9175100-B2 · Nov 3, 2015 · US
Method for forming polymer using boron compound, polymerization initiator and the polymer
US-2015307638-A1 · Oct 29, 2015 · US
Dual metallocene catalyst systems for decreasing melt index and increasing polymer production rates
US-9169333-B2 · Oct 27, 2015 · US
Processes for preparing metallocene-based catalyst systems
US-9163098-B2 · Oct 20, 2015 · US
Metal complex catalysts and polymerization methods employing same
US-9150671-B2 · Oct 6, 2015 · US
Modified phosphinimine catalysts for olefin polymerization
US-9127094-B2 · Sep 8, 2015 · US
Ligand compound, chromium compound and catalyst system including the same
US-9120881-B2 · Sep 1, 2015 · US
Process for controlling molecular weight of polyolefins prepared using pyridyl diamide catalyst systems
US-9102773-B2 · Aug 11, 2015 · US
Polyethylene composition and finished products made thereof
US-9090719-B2 · Jul 28, 2015 · US
Catalyst for polymerization of olefins and process thereof
US-2015203604-A1 · Jul 23, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08F4/52?
- CPC C08F4/52 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C08F4/52 (Chemistry & Metallurgy)?
- Our database includes 504 publications tagged with this CPC code.
- Is patent activity under CPC C08F4/52 growing?
- Publication counts under this code: 28 in 2024 vs 29 in 2025 (latest complete years).