Treating raw natural gas
US-2018363978-A1 · Dec 20, 2018 · US
Cellulose acetate
Cellulose acetate · 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 | B01D71/16 |
| Official title | Cellulose acetate |
| Display label | Cellulose acetate |
| Total patents | 155 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 20 |
| 2016 | 12 |
| 2017 | 17 |
| 2018 | 14 |
| 2019 | 13 |
| 2020 | 15 |
| 2021 | 12 |
| 2022 | 12 |
| 2023 | 6 |
| 2024 | 15 |
| 2025 | 15 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Purification of Lithium-Containing Brine
US-2018353907-A1 · Dec 13, 2018 · US
Crosslinked polymer membranes and methods of their production
US-2018318774-A1 · Nov 8, 2018 · US
Method for reducing amyloid beta concentration in blood
US-10112000-B2 · Oct 30, 2018 · US
Multilayer Composite Gas Separation Membranes with two Selective Layers
US-2018178169-A1 · Jun 28, 2018 · US
Gas separation membranes with intermixed layers
US-10005043-B2 · Jun 26, 2018 · US
Method and apparatus for removing high concentration acid gas from natural gas
US-9975079-B2 · May 22, 2018 · US
High selectivity chemically cross-linked rubbery membranes and their use for separations
US-2018133663-A1 · May 17, 2018 · US
Multiple membrane separation process using glassy polymeric membrane and rubbery polymeric membrane
US-2018133644-A1 · May 17, 2018 · US
Process for maximizing hydrogen recovery
US-2018111831-A1 · Apr 26, 2018 · US
Separation membrane
US-2018065093-A1 · Mar 8, 2018 · US
Membrane fouling reduction using chemical micropumps
US-9833744-B2 · Dec 5, 2017 · US
Gas separation membrane, gas separation module, gas separation apparatus, gas separation method, and method for producing asymmetric gas separation membrane
US-2017333835-A1 · Nov 23, 2017 · US
Multilayer semipermeable membrane
US-2017326506-A1 · Nov 16, 2017 · US
Gas Separation Membranes with Intermixed Layers
US-2017296981-A1 · Oct 19, 2017 · US
Gas separation membranes with intermixed layers
US-9731248-B2 · Aug 15, 2017 · US
Forward osmosis membrane and forward osmosis treatment system
US-2017225131-A1 · Aug 10, 2017 · US
Hollow- fiber membrane blood purification device
US-2017209836-A1 · Jul 27, 2017 · US
Hydrophilic, light active coating for membranes
US-2017203258-A1 · Jul 20, 2017 · US
Curable compositions and membranes
US-9700848-B2 · Jul 11, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/16?
- CPC B01D71/16 is the Cooperative Patent Classification code for “Cellulose acetate.”
- How many patents are filed under CPC B01D71/16 (Cellulose acetate)?
- Our database includes 155 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/16 growing?
- Publication counts under this code: 15 in 2024 vs 15 in 2025 (latest complete years).