Porous hollow fiber membrane
US-2017348649-A1 · Dec 7, 2017 · US
by stretching
by stretching · 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 | B01D67/0027 |
| Official title | {by stretching} |
| Display label | by stretching |
| Total patents | 245 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 25 |
| 2017 | 26 |
| 2018 | 17 |
| 2019 | 19 |
| 2020 | 20 |
| 2021 | 29 |
| 2022 | 18 |
| 2023 | 23 |
| 2024 | 25 |
| 2025 | 19 |
| 2026 | 12 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multilayered microporous polyolefin film
US-9799870-B2 · Oct 24, 2017 · US
Biaxially oriented porous membranes, composites, and methods of manufacture and use
US-2017266865-A1 · Sep 21, 2017 · US
Microporous polymeric membranes, battery separators, and production methods therefor
US-9744500-B2 · Aug 29, 2017 · US
Gas separation membrane
US-9724900-B2 · Aug 8, 2017 · US
Microporous material and a method of making same
US-9725566-B2 · Aug 8, 2017 · US
Porous polytetrafluoroethylene membrane and waterproof air-permeable member
US-9713795-B2 · Jul 25, 2017 · US
Microporous material and a method of making same
US-2017207434-A1 · Jul 20, 2017 · US
Porous polytetrafluoroethylene film and method for producing same
US-9695291-B2 · Jul 4, 2017 · US
Production method of microporous plastic film
US-2017165893-A1 · Jun 15, 2017 · US
Substrate for liquid filter and method for producing the same
US-2017151534-A1 · Jun 1, 2017 · US
Hydrocarbon Waste Stream Purification Processes Using Microporous Materials Having Filtration and Adsorption Properties
US-2017129789-A1 · May 11, 2017 · US
Hydrophilic porous polytetrafluoroethylene membrane (I)
US-9643131-B2 · May 9, 2017 · US
Methods of producing and using microporous membranes
US-9647253-B2 · May 9, 2017 · US
Fuel filter monitor for fuel streams
US-9631589-B2 · Apr 25, 2017 · US
Porous polytetrafluoroethylene membrane, method for producing the same, gas-permeable membrane and ventilation member using the same
US-9630150-B2 · Apr 25, 2017 · US
Black porous polytetrafluoroethylene membrane, method for producing same, gas-permeable membrane and ventilation member using same
US-9616391-B2 · Apr 11, 2017 · US
Polyolefin microporous membrane and production method thereof
US-2017092920-A1 · Mar 30, 2017 · US
Microporous material and a method of making same
US-2017072610-A1 · Mar 16, 2017 · US
Hydrophilic porous polytetrafluoroethylene membrane (ii)
US-2017028362-A1 · Feb 2, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D67/0027?
- CPC B01D67/0027 is the Cooperative Patent Classification code for “by stretching.”
- How many patents are filed under CPC B01D67/0027 (by stretching)?
- Our database includes 245 publications tagged with this CPC code.
- Is patent activity under CPC B01D67/0027 growing?
- Publication counts under this code: 25 in 2024 vs 19 in 2025 (latest complete years).