Ion exchange resin for producing bisphenol, and a method for producing bisphenol using said ion exchange resin
US-10851230-B2 · Dec 1, 2020 · US
Ion-exchange resins
Ion-exchange resins · 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 | B01J31/08 |
| Official title | Ion-exchange resins |
| Display label | Ion-exchange resins |
| Total patents | 128 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 9 |
| 2017 | 8 |
| 2018 | 10 |
| 2019 | 14 |
| 2020 | 11 |
| 2021 | 14 |
| 2022 | 13 |
| 2023 | 12 |
| 2024 | 16 |
| 2025 | 9 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of catalysis
US-2020339493-A1 · Oct 29, 2020 · US
Recirculating process for preparing ethylene glycol
US-10807928-B2 · Oct 20, 2020 · US
Process for preparing ethylene glycol
US-10807929-B2 · Oct 20, 2020 · US
Method for improving the manufacture of ethylene glycol
US-10710947-B2 · Jul 14, 2020 · US
Heterogenized catalyst for acetylene dimerization
US-10668455-B2 · Jun 2, 2020 · US
Method of preparing methyl tert-butyl ether
US-10626072-B2 · Apr 21, 2020 · US
Solid polymer membrane electrode
US-2020048781-A1 · Feb 13, 2020 · US
Method and system for cleaning copper-exposed substrate
US-2019381539-A1 · Dec 19, 2019 · US
Method of cleaning resins
US-2019366322-A1 · Dec 5, 2019 · US
Recirculating process for preparing ethylene glycol
US-2019330133-A1 · Oct 31, 2019 · US
Method for improving the manufacture of ethylene glycol
US-2019330132-A1 · Oct 31, 2019 · US
Process for preparing ethylene glycol
US-2019330134-A1 · Oct 31, 2019 · US
Method of preparing methyl tert-butyl ether
US-2019315671-A1 · Oct 17, 2019 · US
Method and system for cleaning copper-exposed substrate
US-10434546-B2 · Oct 8, 2019 · US
Process for producing diisopropyl ether from high purity propylene
US-10392330-B2 · Aug 27, 2019 · US
Process for producing diisopropyl ether from high purity propylene
US-10377688-B2 · Aug 13, 2019 · US
Method of hydrogenation
US-2019210951-A1 · Jul 11, 2019 · US
Process for producing sugar fatty acid ester using anion exchanger as catalyst
US-2019185504-A1 · Jun 20, 2019 · US
Heterogenized catalyst for acetylene dimerization
US-2019118169-A1 · Apr 25, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01J31/08?
- CPC B01J31/08 is the Cooperative Patent Classification code for “Ion-exchange resins.”
- How many patents are filed under CPC B01J31/08 (Ion-exchange resins)?
- Our database includes 128 publications tagged with this CPC code.
- Is patent activity under CPC B01J31/08 growing?
- Publication counts under this code: 16 in 2024 vs 9 in 2025 (latest complete years).