Monolayer, composite, gas separation material, filter, gas separation device and method for manufacturing composite
US-12128366-B2 · Oct 29, 2024 · US
Tubular membranes
Tubular membranes · 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 | B01D69/04 |
| Official title | Tubular membranes |
| Display label | Tubular membranes |
| Total patents | 242 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 25 |
| 2016 | 16 |
| 2017 | 23 |
| 2018 | 16 |
| 2019 | 32 |
| 2020 | 12 |
| 2021 | 21 |
| 2022 | 28 |
| 2023 | 20 |
| 2024 | 24 |
| 2025 | 18 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Separation membrane module and repairing method thereof
US-2017348643-A1 · Dec 7, 2017 · US
Porous membranes and associated separation modules and methods
US-9815031-B2 · Nov 14, 2017 · US
Process for forming a sintered iron oxide impregnated carbon nanotube membrane
US-2017312697-A1 · Nov 2, 2017 · US
Carbon nanotube membranes
US-2017312696-A1 · Nov 2, 2017 · US
Ceramic separation membrane structure, and repair method thereof
US-9782729-B2 · Oct 10, 2017 · US
Porous membranes and associated separation modules and methods
US-2017282131-A1 · Oct 5, 2017 · US
Fabrication of carbon nanotube membranes
US-9776140-B2 · Oct 3, 2017 · US
Honeycomb structure
US-2017274326-A1 · Sep 28, 2017 · US
Method for producing metal nanowires having improved uniformity in length distribution
US-2017278596-A1 · Sep 28, 2017 · US
Aluminum oxide supported gas permeable membranes
US-2017239624-A1 · Aug 24, 2017 · US
Separation membrane structure and method for manufacturing same
US-2017232401-A1 · Aug 17, 2017 · US
Method of separating a gas using at least one membrane in contact with an organosilicon fluid
US-9731245-B2 · Aug 15, 2017 · US
Axial transfer line shell side degassing
US-9700816-B2 · Jul 11, 2017 · US
Method of manufacture of separation membrane structure
US-2017189863-A1 · Jul 6, 2017 · US
Fabrication of carbon nanotube membranes
US-2017113189-A1 · Apr 27, 2017 · US
1, 3-butadiene-separating material, and separation method using said separating material
US-9624144-B2 · Apr 18, 2017 · US
Spliced fiber-reinforced outer shell for cylindrical filtration element
US-9623379-B2 · Apr 18, 2017 · US
Porous support-zeolite membrane composite and process for producing porous support-zeolite membrane composite
US-2017036175-A1 · Feb 9, 2017 · US
UV and thermally treated polymeric membranes
US-9492785-B2 · Nov 15, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D69/04?
- CPC B01D69/04 is the Cooperative Patent Classification code for “Tubular membranes.”
- How many patents are filed under CPC B01D69/04 (Tubular membranes)?
- Our database includes 242 publications tagged with this CPC code.
- Is patent activity under CPC B01D69/04 growing?
- Publication counts under this code: 24 in 2024 vs 18 in 2025 (latest complete years).