Gas separation membrane element, gas separation membrane module and gas separation apparatus
US-11691109-B2 · Jul 4, 2023 · US
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Polymers based on the polymerisation of crotonic acid
Polymers based on the polymerisation of crotonic acid · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D71/404 |
| Official title | {Polymers based on the polymerisation of crotonic acid} |
| Display label | Polymers based on the polymerisation of crotonic acid |
| Total patents | 17 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 5 |
| 2020 | 6 |
| 2021 | 1 |
| 2023 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Acidic gas separation membrane sheet and manufacturing method therefor
US-11642621-B2 · May 9, 2023 · US
Separation membrane sheet, separation membrane element, separation membrane module, and manufacturing method for separation membrane sheet
US-11045761-B2 · Jun 29, 2021 · US
Separation membrane sheet, separation membrane element, separation membrane module, and manufacturing method for separation membrane sheet
US-2020406184-A1 · Dec 31, 2020 · US
Gel having interpenetrating network
US-2020407515-A1 · Dec 31, 2020 · US
Gel including condensation product of organic silicon compound
US-10765993-B2 · Sep 8, 2020 · US
Carbon dioxide gas separation membrane, method for manufacturing same, and carbon dioxide gas separation membrane module
US-10744454-B2 · Aug 18, 2020 · US
Acidic gas separation membrane sheet and manufacturing method therefor
US-2020061530-A1 · Feb 27, 2020 · US
Gel including condensation product of organic silicon compound
US-2020047115-A1 · Feb 13, 2020 · US
Gas separation method
US-10441917-B2 · Oct 15, 2019 · US
Gas separation membrane element, gas separation membrane module and gas separation apparatus
US-2019247797-A1 · Aug 15, 2019 · US
Gas separation method
US-10315156-B2 · Jun 11, 2019 · US
Gas separation method
US-2019083925-A1 · Mar 21, 2019 · US
Gas separation method
US-2019083926-A1 · Mar 21, 2019 · US
Spiral-wound acid gas separation membrane element, acid gas separation membrane module, and acid gas separation apparatus
US-10092880-B2 · Oct 9, 2018 · US
Spiral-wound acid gas separation membrane element, acid gas separation membrane module, and acid gas separation apparatus
US-2018178166-A1 · Jun 28, 2018 · US
Carbon dioxide gas separation membrane, method for manufacturing same, and carbon dioxide gas separation membrane module
US-2017333833-A1 · Nov 23, 2017 · US