Hollow fiber membrane for dehydration of organic solvents via pervaporation process and a method of fabricating the same
US-10722850-B2 · Jul 28, 2020 · US
Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
Other polymers having nitrogen in the main chain, with or without oxygen or carbon only · 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 | B01D71/58 |
| Official title | Other polymers having nitrogen in the main chain, with or without oxygen or carbon only |
| Display label | Other polymers having nitrogen in the main chain, with or without oxygen or carbon only |
| Total patents | 133 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 12 |
| 2017 | 8 |
| 2018 | 15 |
| 2019 | 4 |
| 2020 | 9 |
| 2021 | 18 |
| 2022 | 7 |
| 2023 | 10 |
| 2024 | 22 |
| 2025 | 9 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Asymmetric polymeric membranes containing a metal-rich dense layer with a controlled thickness and method of making same
US-10696025-B2 · Jun 30, 2020 · US
Method for manufacturing water treatment separator, water treatment separator manufactured using same, and water treatment module comprising water treatment separator
US-10688449-B2 · Jun 23, 2020 · US
Purification of oligosaccharides
US-2020148793-A1 · May 14, 2020 · US
Membrane for the adsorption of bacteria
US-2019329188-A1 · Oct 31, 2019 · US
Poly-benzimidazole with pyrene and anthracene flourophore
US-10266654-B2 · Apr 23, 2019 · US
Continuous on-board processing of seafood after fishing on the sea
US-10231465-B2 · Mar 19, 2019 · US
Hollow-fiber membrane blood purification device
US-10232320-B2 · Mar 19, 2019 · US
Continuous On-Board Processing of Seafood After Fishing on the Sea
US-2018332865-A1 · Nov 22, 2018 · US
Continuous On-Board Processing of Seafood after Fishing on the Sea
US-2018332864-A1 · Nov 22, 2018 · US
Phosphate adsorbing agent for blood processing, blood processing system and blood processing method
US-2018326136-A1 · Nov 15, 2018 · US
Method for manufacturing water treatment separator, water treatment separator manufactured using same, and water treatment module comprising water treatment separator
US-2018318765-A1 · Nov 8, 2018 · US
Filter device
US-2018290107-A1 · Oct 11, 2018 · US
Highly crosslinked hybrid polyimide-silsesquioxane membranes
US-10052592-B2 · Aug 21, 2018 · US
Composition for interfacial polymerization of polyamide and method for manufacturing reverse osmosis membrane using same
US-2018229189-A1 · Aug 16, 2018 · US
Ionic polyamide and polyamide-imide materials and methods of use
US-2018230272-A1 · Aug 16, 2018 · US
In-situ solar-to-heat coating for drinking water purification, seawater desalination, and wastewater treatment
US-2018221829-A1 · Aug 9, 2018 · US
Two-dimensional structures from peptoid oligomers and methods of making
US-2018215792-A1 · Aug 2, 2018 · US
Porous membrane, blood purifying module incorporating porous membrane, and method for producing porous membrane
US-9993777-B2 · Jun 12, 2018 · US
Organic-inorganic composite, structural body, and method for producing organic-inorganic composite
US-9944767-B2 · Apr 17, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/58?
- CPC B01D71/58 is the Cooperative Patent Classification code for “Other polymers having nitrogen in the main chain, with or without oxygen or carbon only.”
- How many patents are filed under CPC B01D71/58 (Other polymers having nitrogen in the main chain, with or without oxygen or carbon only)?
- Our database includes 133 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/58 growing?
- Publication counts under this code: 22 in 2024 vs 9 in 2025 (latest complete years).