Wastewater and sludge treatment device and method
US-2025263323-A1 · Aug 21, 2025 · US
using calcium compounds
using calcium compounds · 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 | C02F11/145 |
| Official title | using calcium compounds |
| Display label | using calcium compounds |
| Total patents | 28 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 5 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 6 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Deposition of flocculated tailings
US-12378146-B2 · Aug 5, 2025 · US
Method for treating waste waters and residue sludge by means of decarbonation in a chemical installation for nitridation in a molten salt bath
US-2025223213-A1 · Jul 10, 2025 · US
Wastewater and sludge treatment device and method
US-12319603-B2 · Jun 3, 2025 · US
Method of sludge pretreatment for improved digestibility and reduced scaling
US-2024425400-A1 · Dec 26, 2024 · US
Processes and apparatuses for converting poly- and perfluoroalkyl substances
US-2024336511-A1 · Oct 10, 2024 · US
Processes and apparatuses for converting poly- and perfluoroalkyl substances
US-2024335808-A1 · Oct 10, 2024 · US
Wastewater and sludge treatment device and method
US-2024336509-A1 · Oct 10, 2024 · US
Processes and apparatuses for converting poly- and perfluoroalkyl substances
US-2024336510-A1 · Oct 10, 2024 · US
Deposition of flocculated tailings
US-2024116793-A1 · Apr 11, 2024 · US
Cellulose nanocrystal-supported sodium alginate adsorbent
US-11577220-B2 · Feb 14, 2023 · US
Cellulose Nanocrystal-supported Sodium Alginate Adsorbent and Use Thereof in Enriching Organic Phosphorus in Wastewater
US-2022323932-A1 · Oct 13, 2022 · US
Eco-efficient method for manufacturing concrete
US-2022098098-A1 · Mar 31, 2022 · US
System and method for reducing liquid discharge from one or more devices
US-10987626-B2 · Apr 27, 2021 · US
Treatment system and method for ex-situ carbonization and solidification of silt soil using active magnesium oxide
US-10920390-B2 · Feb 16, 2021 · US
Ballasted solids treatment system and method
US-10829402-B2 · Nov 10, 2020 · US
Dewatering flocculated tailings
US-2020156969-A1 · May 21, 2020 · US
Treatment System and Method for Ex-situ Carbonization and Solidification of Silt Soil Using Active Magnesium Oxide
US-2020115875-A1 · Apr 16, 2020 · US
Aluminum hydroxide coagulant recovery from water/wastewater treatment sludge
US-10358355-B2 · Jul 23, 2019 · US
Dosage optimization method of chemical conditioner for deep dewatering of sludge
US-2019210905-A1 · Jul 11, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F11/145?
- CPC C02F11/145 is the Cooperative Patent Classification code for “using calcium compounds.”
- How many patents are filed under CPC C02F11/145 (using calcium compounds)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC C02F11/145 growing?
- Publication counts under this code: 6 in 2024 vs 4 in 2025 (latest complete years).