Monolayer, composite, gas separation material, filter, gas separation device and method for manufacturing composite
US-12128366-B2 · Oct 29, 2024 · US
Polytetrafluoroethylene
Polytetrafluoroethylene · 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 | B01D71/36 |
| Official title | Polytetrafluoroethylene |
| Display label | Polytetrafluoroethylene |
| Total patents | 678 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 42 |
| 2016 | 65 |
| 2017 | 52 |
| 2018 | 46 |
| 2019 | 54 |
| 2020 | 85 |
| 2021 | 67 |
| 2022 | 70 |
| 2023 | 75 |
| 2024 | 61 |
| 2025 | 49 |
| 2026 | 12 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Apparatus and method for transferring a fluid sample from a fluid sample collection apparatus to a liquid sample analyzer
US-2024286139-A1 · Aug 29, 2024 · US
Crosslinked ion-exchange materials, related methods, and related articles
US-2024050906-A1 · Feb 15, 2024 · US
Method for preparing a porous fluoropolymer and preparing an article of same
US-2016375385-A1 · Dec 29, 2016 · US
Asymmetric Polytetrafluoroethylene Composite Having A Macro-Textured Surface and Method For Making The Same
US-2016367947-A1 · Dec 22, 2016 · US
Method for manufacturing composite porous film for fluid separation
US-2016332122-A1 · Nov 17, 2016 · US
Method for producing porous polytetrafluoroethylene membrane, method for producing waterproof gas-permeable member, and method for producing air filter medium
US-2016325235-A1 · Nov 10, 2016 · US
Composite Membrane
US-2016317978-A1 · Nov 3, 2016 · US
Acidic gas separation laminate and acidic gas separation module provided with laminate
US-9457319-B2 · Oct 4, 2016 · US
Method for preparing a porous fluoropolymer and preparing an article of same
US-9452372-B2 · Sep 27, 2016 · US
Surface-modified fluoropolymer membrane
US-2016271568-A1 · Sep 22, 2016 · US
Filter device
US-2016199768-A1 · Jul 14, 2016 · US
Composition, porous polymer membrane and hydrophilic agent
US-2016145369-A1 · May 26, 2016 · US
Article Containing Nanofiber Membrane for Bacterial Filtration
US-2016136558-A1 · May 19, 2016 · US
Energy-Efficient Conductive-Gap Membrane Distillation
US-2016074812-A1 · Mar 17, 2016 · US
Filter water management using hydrophilic material
US-2016061158-A1 · Mar 3, 2016 · US
Method for treating industrial water by physical separation, adsorption on resin and reverse osmosis, and corresponding plant
US-2016060151-A1 · Mar 3, 2016 · US
Oil repellency-imparted air-permeable filter with adhesive layer
US-9254467-B2 · Feb 9, 2016 · US
Filtration Article Containing a Filtration Material Containing Fibrous Layers Having Different Lengths
US-2015360181-A1 · Dec 17, 2015 · US
Organic Solvent Purifier And Method Of Using
US-2015343391-A1 · Dec 3, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/36?
- CPC B01D71/36 is the Cooperative Patent Classification code for “Polytetrafluoroethylene.”
- How many patents are filed under CPC B01D71/36 (Polytetrafluoroethylene)?
- Our database includes 678 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/36 growing?
- Publication counts under this code: 61 in 2024 vs 49 in 2025 (latest complete years).