Recycled content triacetin
US-2023174455-A1 · Jun 8, 2023 · US
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Preparation of carboxylic acid anhydrides (by oxidation C07C51/16)
Preparation of carboxylic acid anhydrides (by oxidation C07C51/16) · 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 | C07C51/54 |
| Official title | Preparation of carboxylic acid anhydrides (by oxidation C07C51/16) |
| Display label | Preparation of carboxylic acid anhydrides (by oxidation C07C51/16) |
| Total patents | 16 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 6 |
| 2023 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Catalytic carbonylation catalysts and methods
US-10479861-B2 · Nov 19, 2019 · US
Method and apparatus for producing a chemical compound and the produced chemical compound
US-10442998-B2 · Oct 15, 2019 · US
Catalytic carbonylation catalysts and methods
US-2019256650-A1 · Aug 22, 2019 · US
Method and apparatus for producing a chemical compound and the produced chemical compound
US-2019169507-A2 · Jun 6, 2019 · US
Catalytic carbonylation catalysts and methods
US-10221278-B2 · Mar 5, 2019 · US
Method and apparatus for producing a chemical compound and the produced chemical compound
US-2019031962-A2 · Jan 31, 2019 · US
Method for producing carboxylic acid anhydride and method for producing carboxylic acid ester
US-10125081-B2 · Nov 13, 2018 · US
Process for the functionalization of heteroalkanes and arenes
US-10011547-B2 · Jul 3, 2018 · US
Method and apparatus for producing a chemical compound and the produced chemical compound
US-2018179449-A1 · Jun 28, 2018 · US
Method for separating high-boiling carboxylic acid vinyl ester/carboxylic acid mixtures
US-9822059-B2 · Nov 21, 2017 · US
Process for the functionalization of heteroalkanes and arenes
US-2017275222-A1 · Sep 28, 2017 · US
Method for producing carboxylic acid anhydride and method for producing carboxylic acid ester
US-2017088502-A1 · Mar 30, 2017 · US
Catalytic carbonylation catalysts and methods
US-2017073463-A1 · Mar 16, 2017 · US
Catalytic carbonylation catalysts and methods
US-9327280-B2 · May 3, 2016 · US
Coproduction of acetic acid and acetic anhydride
US-9012683-B2 · Apr 21, 2015 · US