Proton conductor
US-2016344054-A1 · Nov 24, 2016 · US
Organic acids, e.g. EDTA, citrate, acetate, oxalate
Organic acids, e.g. EDTA, citrate, acetate, oxalate · 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 | C04B2235/449 |
| Official title | Organic acids, e.g. EDTA, citrate, acetate, oxalate |
| Display label | Organic acids, e.g. EDTA, citrate, acetate, oxalate |
| Total patents | 352 |
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 | 51 |
| 2016 | 48 |
| 2017 | 40 |
| 2018 | 37 |
| 2019 | 35 |
| 2020 | 42 |
| 2021 | 26 |
| 2022 | 25 |
| 2023 | 23 |
| 2024 | 15 |
| 2025 | 7 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piezoelectric composition and piezoelectric element
US-9437807-B2 · Sep 6, 2016 · US
Piezoelectric material
US-9419204-B2 · Aug 16, 2016 · US
LaNiO3 thin film-forming composition and method of forming LaNiO3 thin film using the same
US-9412485-B2 · Aug 9, 2016 · US
Method for producing dense lithium lanthanum tantalate lithium-ion conducting ceramics
US-2016221880-A1 · Aug 4, 2016 · US
Beta-aluminum oxide ceramics obtainable by extrusion of a mixture that contains a sodium compound
US-2016221242-A1 · Aug 4, 2016 · US
Method for controlling aluminum titanate ceramic filter properties
US-9272956-B2 · Mar 1, 2016 · US
Piezoelectric material, piezoelectric element, and electronic device
US-2016005952-A1 · Jan 7, 2016 · US
Zeolite, method for manufacturing zeolite, honeycomb catalyst, and exhaust gas purifyig apparatus
US-2016001274-A1 · Jan 7, 2016 · US
Thermoelectric Materials and Devices Comprising Graphene
US-2015380625-A1 · Dec 31, 2015 · US
Thermistor material and method of preparing the same
US-2015371742-A1 · Dec 24, 2015 · US
Method for producing a powdered precursor material, powdered precursor material and use thereof
US-2015361339-A1 · Dec 17, 2015 · US
Freestanding Films With Electric Field-Enhanced Piezoelectric Coefficients
US-2015364673-A1 · Dec 17, 2015 · US
Oxide sintered body and sputtering target
US-9209257-B2 · Dec 8, 2015 · US
Product comprising an oriented function and process for obtaining same
US-2015329431-A1 · Nov 19, 2015 · US
High solids HBN slurry, HBN paste, spherical HBN powder, and methods of making and using them
US-RE45803-E · Nov 17, 2015 · US
Porous mullite bodies having improved thermal stability
US-2015299045-A1 · Oct 22, 2015 · US
Piezoelectric material, piezoelectric element, and electronic device
US-9166140-B2 · Oct 20, 2015 · US
Piezoelectric material, piezoelectric element, and electronic equipment
US-2015295160-A1 · Oct 15, 2015 · US
Piezoelectric material, piezoelectric element, and electronic equipment
US-2015295161-A1 · Oct 15, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B2235/449?
- CPC C04B2235/449 is the Cooperative Patent Classification code for “Organic acids, e.g. EDTA, citrate, acetate, oxalate.”
- How many patents are filed under CPC C04B2235/449 (Organic acids, e.g. EDTA, citrate, acetate, oxalate)?
- Our database includes 352 publications tagged with this CPC code.
- Is patent activity under CPC C04B2235/449 growing?
- Publication counts under this code: 15 in 2024 vs 7 in 2025 (latest complete years).