Spray-dried catalysts containing a germanium-bridged bis-biphenyl-phenoxy organometallic compound for making ethylene-based copolymers
US-12492270-B2 · Dec 9, 2025 · US
Dianionic ligand
Dianionic ligand · 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 | C08F4/64186 |
| Official title | {Dianionic ligand} |
| Display label | Dianionic ligand |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 5 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for producing long-chain branched ethylene-based polymers
US-12479937-B2 · Nov 25, 2025 · US
Transition metal catalysts for olefin polymerization
US-12473383-B2 · Nov 18, 2025 · US
Catalyst systems and processes for producing polyethylene using the same
US-12428502-B2 · Sep 30, 2025 · US
Post-metallocene compounds
US-12371448-B2 · Jul 29, 2025 · US
Monobidentate, bis-bidentate, and tetrabidentate guanidine Group IV transition metal olefin copolymerization catalysts
US-12221507-B2 · Feb 11, 2025 · US
Spray-dried catalysts containing a germanium-bridged bis-biphenyl-phenoxy organometallic compound for making ethylene-based copolymers
US-2023287159-A1 · Sep 14, 2023 · US
Catalyst systems and processes for producing polyethylene using the same
US-2023235099-A1 · Jul 27, 2023 · US
A process for producing long-chain branched ethylene-based polymers
US-2023128870-A1 · Apr 27, 2023 · US
Post-metallocene compounds
US-2023106768-A1 · Apr 6, 2023 · US
Transition metal catalysts for olefin polymerization
US-2023002515-A1 · Jan 5, 2023 · US
Monobidentate, bis-bidentate, and tetrabidentate guanidine group iv transition metal olefin copolymerization catalysts
US-2022235154-A1 · Jul 28, 2022 · US
Artificial turf filament and articles incorporating same
US-11174600-B2 · Nov 16, 2021 · US
Process for producing olefin terpolymers with bridged phenolate transition metal complexes
US-11168162-B2 · Nov 9, 2021 · US
Olefin polymerization catalyst
US-10975172-B2 · Apr 13, 2021 · US
Olefin polymerization catalyst
US-2020299420-A1 · Sep 24, 2020 · US
Thioguanidine group IV transition metal catalysts and polymerization systems
US-10647799-B2 · May 12, 2020 · US
Process for producing olefin terpolymers with bridged phenolate transition metal complexes
US-2020123291-A1 · Apr 23, 2020 · US
Bisphenolate transition metal complexes, production and use thereof
US-10611857-B2 · Apr 7, 2020 · US
Thioguanidine group iv transition metal catalysts and polymerization systems
US-2019263949-A1 · Aug 29, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08F4/64186?
- CPC C08F4/64186 is the Cooperative Patent Classification code for “Dianionic ligand.”
- How many patents are filed under CPC C08F4/64186 (Dianionic ligand)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC C08F4/64186 growing?
- Publication counts under this code: 5 in 2023 vs 6 in 2025 (latest complete years).