Modified Supported Chromium Catalysts and Ethylene-Based Polymers Produced Therefrom
US-2023364595-A1 · Nov 16, 2023 · US
of chromium, molybdenum or tungsten
of chromium, molybdenum or tungsten · 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 | C08F4/22 |
| Official title | of chromium, molybdenum or tungsten |
| Display label | of chromium, molybdenum or tungsten |
| Total patents | 78 |
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 | 4 |
| 2016 | 6 |
| 2017 | 7 |
| 2018 | 5 |
| 2019 | 7 |
| 2020 | 9 |
| 2021 | 5 |
| 2022 | 11 |
| 2023 | 11 |
| 2024 | 8 |
| 2025 | 2 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods for Making Supported Chromium Catalysts with Increased Polymerization Activity
US-2023285940-A1 · Sep 14, 2023 · US
Cyclic polyolefins derived from hexyne, octyne, nonyne, pentadecyne and their copolymers with acetylene
US-11725068-B2 · Aug 15, 2023 · US
Modified Supported Chromium Catalysts and Ethylene-Based Polymers Produced Therefrom
US-2023182121-A1 · Jun 15, 2023 · US
Methods for making supported chromium catalysts with increased polymerization activity
US-11673120-B2 · Jun 13, 2023 · US
Preparation of large pore silicas and uses thereof in chromium catalysts for olefin polymerization
US-11548958-B2 · Jan 10, 2023 · US
Methods for Making Supported Chromium Catalysts with Increased Polymerization Activity
US-2022347656-A1 · Nov 3, 2022 · US
Preparation of Large Pore Silicas and Uses Thereof in Chromium Catalysts for Olefin Polymerization
US-2022275116-A1 · Sep 1, 2022 · US
Modified Supported Chromium Catalysts and Ethylene-Based Polymers Produced Therefrom
US-2022266231-A1 · Aug 25, 2022 · US
Preparation of large pore silicas and uses thereof in chromium catalysts for olefin polymerization
US-11384175-B2 · Jul 12, 2022 · US
Modified supported chromium catalysts and ethylene-based polymers produced therefrom
US-11376575-B2 · Jul 5, 2022 · US
Methods of Preparing a Catalyst
US-2022203333-A1 · Jun 30, 2022 · US
Methods for making supported chromium catalysts with increased polymerization activity
US-11369947-B2 · Jun 28, 2022 · US
Light treatment of chromium catalysts and related catalyst preparation systems and polymerization processes
US-11338278-B2 · May 24, 2022 · US
Methods of preparing a catalyst
US-11331650-B2 · May 17, 2022 · US
Cyclic polyolefins derived from hexyne, octyne, nonyne, pentadecyne and their copolymers with acetylene
US-2022025082-A1 · Jan 27, 2022 · US
Preparation of Large Pore Silicas and Uses Thereof in Chromium Catalysts for Olefin Polymerization
US-2022002449-A1 · Jan 6, 2022 · US
Light Treatment of Chromium Catalysts and Related Catalyst Preparation Systems and Polymerization Processes
US-2021402383-A1 · Dec 30, 2021 · US
Preparation of large pore silicas and uses thereof in chromium catalysts for olefin polymerization
US-11186656-B2 · Nov 30, 2021 · US
Light treatment of chromium catalysts and related catalyst preparation systems and polymerization processes
US-11173475-B2 · Nov 16, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08F4/22?
- CPC C08F4/22 is the Cooperative Patent Classification code for “of chromium, molybdenum or tungsten.”
- How many patents are filed under CPC C08F4/22 (of chromium, molybdenum or tungsten)?
- Our database includes 78 publications tagged with this CPC code.
- Is patent activity under CPC C08F4/22 growing?
- Publication counts under this code: 8 in 2024 vs 2 in 2025 (latest complete years).