Recycled content paraxylene and related chemical compounds from waste plastic
US-2026035624-A1 · Feb 5, 2026 · US
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of compounds containing six-membered aromatic rings without ring-splitting
of compounds containing six-membered aromatic rings without ring-splitting · 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 | C07C51/255 |
| Official title | of compounds containing six-membered aromatic rings without ring-splitting |
| Display label | of compounds containing six-membered aromatic rings without ring-splitting |
| Total patents | 22 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 4 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 2 |
| 2024 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Preparation of 6-substituted menadiones
US-2024327328-A1 · Oct 3, 2024 · US
Compounds and synthetic methods for the preparation of retinoid x receptor-specific retinoids
US-2021139404-A1 · May 13, 2021 · US
Compounds and synthetic methods for the preparation of retinoid X receptor-specific retinoids
US-10919835-B2 · Feb 16, 2021 · US
Compounds and synthetic methods for the preparation of retinoid x receptor-specific retinoids
US-2020190008-A1 · Jun 18, 2020 · US
Compounds and synthetic methods for the preparation of retinoid X receptor-specific retinoids
US-10590059-B2 · Mar 17, 2020 · US
Using pressurized wet gas lines to avoid fouling in purified terephthalic acid (PTA) filters and lines
US-10577301-B2 · Mar 3, 2020 · US
Two-Phase Reactions in Microdroplets
US-2019352247-A1 · Nov 21, 2019 · US
Purified terephthalic acid (PTA) vent steam utilization
US-10414712-B2 · Sep 17, 2019 · US
Compounds and synthetic methods for the preparation of retinoid x receptor-specific retinoids
US-2019152888-A1 · May 23, 2019 · US
Using pressurized wet gas lines to avoid fouling in purified terephthalic acid (pta) filters and lines
US-2018312460-A1 · Nov 1, 2018 · US
Catalyst having a modified silicon carbide support and its use as a hydrogenation catalyst
US-2018273463-A1 · Sep 27, 2018 · US
Purified terephthalic acid (pta) vent steam utilization
US-2018186719-A1 · Jul 5, 2018 · US
Fuel reforming system
US-2016333283-A1 · Nov 17, 2016 · US
Process and apparatus for manufacturing aromatic carboxylic acids
US-9428436-B2 · Aug 30, 2016 · US
Process to produce terephthalic acid
US-9302971-B2 · Apr 5, 2016 · US
Spray process for selective oxidation
US-9238608-B2 · Jan 19, 2016 · US
Process and apparatus for manufacturing aromatic carboxylic acids
US-2015166452-A1 · Jun 18, 2015 · US
Power recovery
US-2015167501-A1 · Jun 18, 2015 · US
Process to Produce Terephthalic Acid
US-2015126772-A1 · May 7, 2015 · US