Processes for recovering dialkyl terephthalates from tetramethyl cyclobutanediol (tmcd)-containing polymers
US-2026071047-A1 · Mar 12, 2026 · US
by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group
by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07C67/28 |
| Official title | by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group |
| Display label | by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group |
| Total patents | 44 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 13 |
| 2017 | 3 |
| 2018 | 5 |
| 2019 | 4 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 1 |
| 2024 | 3 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Processes for recovering dialkyl terephthalates from polyester compositions
US-2026070868-A1 · Mar 12, 2026 · US
Synthesis of deuterated aldehydes
US-12454502-B2 · Oct 28, 2025 · US
Method for producing fluoroalkoxide
US-2025282704-A1 · Sep 11, 2025 · US
Cyclic compound having iodine atom
US-2025250216-A1 · Aug 7, 2025 · US
Method for producing fluoroalkoxide
US-12338213-B2 · Jun 24, 2025 · US
Processes for recovering dialkyl terephthalates from feedstocks
US-2025002677-A1 · Jan 2, 2025 · US
Processes for recovering dialkyl terephthalates from polyester compositions
US-2025002676-A1 · Jan 2, 2025 · US
Method for producing acid generator
US-2024425440-A1 · Dec 26, 2024 · US
Processes for recovering dialkyl terephthalates from polyester compositions
US-2024409488-A1 · Dec 12, 2024 · US
Systems and processes for producing organic acids directly from beta-lactones
US-12152004-B2 · Nov 26, 2024 · US
Process for crystallization of high purity lutein esters from marigold extracts
US-2022220059-A1 · Jul 14, 2022 · US
Method for producing fluoroalkoxide
US-2021317061-A1 · Oct 14, 2021 · US
Systems and processes for producing organic acids directly from beta-lactones
US-2021221762-A1 · Jul 22, 2021 · US
Biomass-derived polymers and copolymers incorporating monolignols and their derivatives
US-10941104-B2 · Mar 9, 2021 · US
Processing biomass to obtain hydroxylcarboxylic acids
US-2020208180-A1 · Jul 2, 2020 · US
Preparation method for (R)-3-hydroxyl-5-hexenoate
US-10526622-B2 · Jan 7, 2020 · US
Processing biomass to obtain hydroxylcarboxylic acids
US-10501761-B2 · Dec 10, 2019 · US
Method for producing olefin
US-10407365-B2 · Sep 10, 2019 · US
Method for producing aromatic compound
US-10246393-B2 · Apr 2, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C67/28?
- CPC C07C67/28 is the Cooperative Patent Classification code for “by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group.”
- How many patents are filed under CPC C07C67/28 (by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC C07C67/28 growing?
- Publication counts under this code: 3 in 2024 vs 6 in 2025 (latest complete years).