Method for improved reactve monomer production with membrane filtration
US-2018361319-A1 · Dec 20, 2018 · US
using membranes, e.g. selective permeation
using membranes, e.g. selective permeation · 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 | C07C7/144 |
| Official title | using membranes, e.g. selective permeation |
| Display label | using membranes, e.g. selective permeation |
| Total patents | 266 |
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 | 14 |
| 2016 | 15 |
| 2017 | 20 |
| 2018 | 30 |
| 2019 | 35 |
| 2020 | 28 |
| 2021 | 32 |
| 2022 | 27 |
| 2023 | 26 |
| 2024 | 21 |
| 2025 | 13 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Separation of mixed xylenes
US-10150083-B2 · Dec 11, 2018 · US
On-board fuel adjustment by molecular separation
US-10124294-B2 · Nov 13, 2018 · US
Transfer line
US-10105658-B2 · Oct 23, 2018 · US
Recovery of gases, especially permanent gases, from streams of matter, especially from offgas streams from polymerizations
US-10092876-B2 · Oct 9, 2018 · US
Membrane separation device
US-10086325-B2 · Oct 2, 2018 · US
Process for recovery of cracker feed from dry gas
US-10052581-B1 · Aug 21, 2018 · US
Method for separating straight-chain conjugated diene
US-9944576-B2 · Apr 17, 2018 · US
Chemically and uv cross-linked high selectivity polyimide membranes for gas separations
US-2018050310-A1 · Feb 22, 2018 · US
Stable facilitated transport membranes for olefin/paraffin separations
US-2018001268-A1 · Jan 4, 2018 · US
Silica membrane filter
US-2018001273-A1 · Jan 4, 2018 · US
On-board fuel adjustment by molecular separation
US-2017368504-A1 · Dec 28, 2017 · US
High selectivity facilitated transport membranes and their use for olefin/paraffin separations
US-2017354918-A1 · Dec 14, 2017 · US
Method for separating straight-chain conjugated diene
US-2017349510-A1 · Dec 7, 2017 · US
Natural gas refining apparatus and system
US-2017327758-A1 · Nov 16, 2017 · US
Transfer line
US-2017312701-A1 · Nov 2, 2017 · US
Separations With Ionic Liquid Solvents
US-2017305817-A1 · Oct 26, 2017 · US
Fluid Separation Processes Using Membranes Based on Fluorinated and Perfluorinated Polymers
US-2017259204-A1 · Sep 14, 2017 · US
Separations with ionic liquid solvents
US-9732016-B2 · Aug 15, 2017 · US
Recovery of gases, especially permanent gases, from streams of matter, especially from offgas streams from polymerizations
US-2017209830-A1 · Jul 27, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C7/144?
- CPC C07C7/144 is the Cooperative Patent Classification code for “using membranes, e.g. selective permeation.”
- How many patents are filed under CPC C07C7/144 (using membranes, e.g. selective permeation)?
- Our database includes 266 publications tagged with this CPC code.
- Is patent activity under CPC C07C7/144 growing?
- Publication counts under this code: 21 in 2024 vs 13 in 2025 (latest complete years).