Systems and methods for generating personalized displays for users
US-2026087507-A1 · Mar 26, 2026 · US
Control of chemical or physico-chemical variables, e.g. pH value
Control of chemical or physico-chemical variables, e.g. pH value · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G05D21/00 |
| Official title | Control of chemical or physico-chemical variables, e.g. pH value |
| Display label | Control of chemical or physico-chemical variables, e.g. pH value |
| Total patents | 46 |
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 | 2 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 14 |
| 2024 | 6 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Apparatus and method for controlling chemical dosing optimization for water treatment plant
US-12528715-B2 · Jan 20, 2026 · US
Systems and methods for generating personalized landing pages for users
US-12499452-B2 · Dec 16, 2025 · US
Method of processing substrate, method of manufacturing semiconductor device, recording medium, and substrate processing apparatus
US-12431336-B2 · Sep 30, 2025 · US
Systems and methods for validating planting of trees
US-12373849-B2 · Jul 29, 2025 · US
A method and apparatus for monitoring biosludge quality in wastewater treatment
US-2025059075-A1 · Feb 20, 2025 · US
Mobile unit and method for continuously monitoring flowing cooling water
US-12117433-B2 · Oct 15, 2024 · US
Systems and methods for generating personalized landing pages for users
US-2024330958-A1 · Oct 3, 2024 · US
Systems and methods for generating personalized landing pages for users
US-12008582-B2 · Jun 11, 2024 · US
Device and method for repeatedly modifying the composition of a fluid
US-11931733-B2 · Mar 19, 2024 · US
Systems and methods for automatic adjustment of mixed gas flow for an injector coordinated with the acquistion of particular groups of chemical elements for analysis
US-11896991-B1 · Feb 13, 2024 · US
Chemical injection system for a resource extraction system
US-11885219-B2 · Jan 30, 2024 · US
Digital treatment of multi-phase liquid mixtures
US-11794132-B2 · Oct 24, 2023 · US
Method of processing substrate, method of manufacturing semiconductor device, recording medium, and substrate processing apparatus
US-2023317420-A1 · Oct 5, 2023 · US
Ozone generating apparatus
US-2023271832-A1 · Aug 31, 2023 · US
Apparatus and method for controlling chemical dosing optimization for water treatment plant
US-2023212033-A1 · Jul 6, 2023 · US
Systems and methods for determining a total amount of carbon emissions produced by a vehicle
US-2023131645-A1 · Apr 27, 2023 · US
Systems and methods for determining a total amount of carbon emissions of an individual
US-2023028260-A1 · Jan 26, 2023 · US
Systems and methods for offering carbon offset rewards that correspond to users
US-2023016022-A1 · Jan 19, 2023 · US
Systems and methods for generating personalized landing pages for users
US-2023016696-A1 · Jan 19, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G05D21/00?
- CPC G05D21/00 is the Cooperative Patent Classification code for “Control of chemical or physico-chemical variables, e.g. pH value.”
- How many patents are filed under CPC G05D21/00 (Control of chemical or physico-chemical variables, e.g. pH value)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC G05D21/00 growing?
- Publication counts under this code: 6 in 2024 vs 4 in 2025 (latest complete years).