Radiation-sensitive composition, method for forming resist pattern, and compound
US-2025334880-A1 · Oct 30, 2025 · US
Oxalic acid esters
Oxalic acid esters · 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 | C07C69/36 |
| Official title | Oxalic acid esters |
| Display label | Oxalic acid esters |
| Total patents | 41 |
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 | 4 |
| 2016 | 5 |
| 2019 | 3 |
| 2020 | 8 |
| 2021 | 7 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Musky odorant
US-2025263629-A1 · Aug 21, 2025 · US
Carbon monoxide prodrugs for the treatment of medical disorders
US-2024391886-A1 · Nov 28, 2024 · US
Polymeric biomaterials derived from phenolic monomers and their medical uses
US-2024301134-A1 · Sep 12, 2024 · US
Carbon monoxide prodrugs for the treatment of medical disorders
US-12071415-B2 · Aug 27, 2024 · US
Polymeric biomaterials derived from phenolic monomers and their medical uses
US-12030983-B2 · Jul 9, 2024 · US
Preparation of secondary amines with electrophilic N-linchpin reagents
US-11767291-B2 · Sep 26, 2023 · US
Silicon-based energy storage devices with electrolyte additive compounds
US-11742519-B2 · Aug 29, 2023 · US
Polymeric biomaterials derived from phenolic monomers and their medical uses
US-11649203-B2 · May 16, 2023 · US
Electrolytic solution, electrochemical device, lithium-ion secondary cell, and module
US-11594761-B2 · Feb 28, 2023 · US
Polymeric biomaterials derived from phenolic monomers and their medical uses
US-11472918-B2 · Oct 18, 2022 · US
Calixarene compound, curable composition and cured product
US-2022315527-A1 · Oct 6, 2022 · US
Inhibitors of antibiotic resistance mediated by arnt
US-2022259249-A1 · Aug 18, 2022 · US
Polymeric biomaterials derived from phenolic monomers and their medical uses
US-2022002478-A1 · Jan 6, 2022 · US
Composition and methods and uses relating thereto
US-11186792-B2 · Nov 30, 2021 · US
Polymeric biomaterials derived from phenolic monomers and their medical uses
US-11124603-B2 · Sep 21, 2021 · US
Preparation of secondary amines with electrophilic n-linchpin reagents
US-2021261503-A1 · Aug 26, 2021 · US
Use of polycarboxylic acid compounds for the treatment of fibrious amino acid based substrates, especially hair
US-11090255-B2 · Aug 17, 2021 · US
Carbon monoxide prodrugs for the treatment of medical disorders
US-2021238155-A1 · Aug 5, 2021 · US
Onium salt compound, chemically amplified resist composition and patterning process
US-2021188770-A1 · Jun 24, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C69/36?
- CPC C07C69/36 is the Cooperative Patent Classification code for “Oxalic acid esters.”
- How many patents are filed under CPC C07C69/36 (Oxalic acid esters)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC C07C69/36 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).