Polymerization catalysts for production of polyethylene with high molecular weight
US-2022389137-A1 · Dec 8, 2022 · US
Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 {(C08F4/64003 - C08F4/64196 take precedence)}
Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 {(C08F4/64003 - C08F4/64196 take precedence)} · 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 | C08F4/646 |
| Official title | Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 {(C08F4/64003 - C08F4/64196 take precedence)} |
| Display label | Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 {(C08F4/64003 - C08F4/64196 take precedence)} |
| Total patents | 78 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 16 |
| 2020 | 4 |
| 2021 | 14 |
| 2022 | 14 |
| 2023 | 5 |
| 2024 | 5 |
| 2025 | 7 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Components and catalysts for the polymerization of olefins
US-11466107-B2 · Oct 11, 2022 · US
Process for producing propylene copolymers with low VOC content
US-11421055-B2 · Aug 23, 2022 · US
Methods of Preparing a Catalyst
US-2022203333-A1 · Jun 30, 2022 · US
Production of high melt flow propylene-based polymer and product from same
US-2022177611-A1 · Jun 9, 2022 · US
Methods of preparing a catalyst
US-11331650-B2 · May 17, 2022 · US
Boron-based electron donors for Ziegler-Natta catalyst systems
US-11291981-B2 · Apr 5, 2022 · US
Catalyst components for the polymerization of olefins
US-11267910-B2 · Mar 8, 2022 · US
Hybrid Supported Metallocene Catalyst and Method for Preparing Polypropylene Using the Same
US-2022056163-A1 · Feb 24, 2022 · US
Process for production of high melt flow propylene-based polymer and product from same
US-11254756-B2 · Feb 22, 2022 · US
Supported Catalyst Systems and Processes for Use Thereof
US-2022048016-A1 · Feb 17, 2022 · US
Hybrid supported metallocene catalyst, and polyolefin resin having excellent processability and using same
US-11248067-B2 · Feb 15, 2022 · US
Transition metal compound and method for preparing the same
US-11225495-B2 · Jan 18, 2022 · US
Universal alpha-olefin polymerization catalyst, and application thereof
US-11220560-B2 · Jan 11, 2022 · US
Carrier for olefin polymerization catalyst, and preparation method therefor and application thereof
US-2021371552-A1 · Dec 2, 2021 · US
Process for making propylene-based copolymer
US-2021355249-A1 · Nov 18, 2021 · US
Process for making propylene-based terpolymer
US-2021292449-A1 · Sep 23, 2021 · US
Homopolypropylene and method for preparing the same
US-11117990-B2 · Sep 14, 2021 · US
Components and catalysts for the polymerization of olefins
US-2021269564-A1 · Sep 2, 2021 · US
Olefin coordination polymerization catalyst, and preparation method and application thereof
US-11014994-B2 · May 25, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08F4/646?
- CPC C08F4/646 is the Cooperative Patent Classification code for “Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 {(C08F4/64003 - C08F4/64196 take precedence)}.”
- How many patents are filed under CPC C08F4/646 (Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 {(C08F4/64003 - C08F4/64196 take precedence)})?
- Our database includes 78 publications tagged with this CPC code.
- Is patent activity under CPC C08F4/646 growing?
- Publication counts under this code: 5 in 2024 vs 7 in 2025 (latest complete years).