Method for producing a prefabricated building material
US-10131580-B2 · Nov 20, 2018 · US
for the density
for the density · 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 | C04B2201/20 |
| Official title | for the density |
| Display label | for the density |
| Total patents | 337 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 14 |
| 2017 | 14 |
| 2018 | 30 |
| 2019 | 42 |
| 2020 | 50 |
| 2021 | 36 |
| 2022 | 24 |
| 2023 | 31 |
| 2024 | 47 |
| 2025 | 42 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Development of retarded acid system
US-2018320063-A1 · Nov 8, 2018 · US
Methods of using drilling fluid compositions with enhanced rheology
US-2018320050-A1 · Nov 8, 2018 · US
High-performance heat-insulating materials
US-10119775-B2 · Nov 6, 2018 · US
Dispersant in cement formulations for oil and gas wells
US-2018312439-A1 · Nov 1, 2018 · US
Dispersant in cement formulations for oil and gas wells
US-2018282216-A1 · Oct 4, 2018 · US
Fiber board product comprising a calcium carbonate-containing material
US-10086532-B2 · Oct 2, 2018 · US
Process for treating waste from a pithead power plant and for sequestrating carbon dioxide discharged therefrom
US-10052668-B1 · Aug 21, 2018 · US
Spacer fluids and cement slurries that include surfactants
US-2018223168-A1 · Aug 9, 2018 · US
Emulsified drilling fluids and methods of making and use thereof
US-2018223164-A1 · Aug 9, 2018 · US
Spacer fluid compositions that include surfactants
US-2018223169-A1 · Aug 9, 2018 · US
Anti-bit balling drilling fluids, and methods of making and use thereof
US-2018223160-A1 · Aug 9, 2018 · US
Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore
US-2018223156-A1 · Aug 9, 2018 · US
Development of anti-bit balling fluids
US-2018223162-A1 · Aug 9, 2018 · US
Lubricants for water-based drilling fluids
US-2018223153-A1 · Aug 9, 2018 · US
Cement slurries, cured cement and methods of making and use thereof
US-2018222797-A1 · Aug 9, 2018 · US
Development of anti-bit balling fluids
US-2018223161-A1 · Aug 9, 2018 · US
Emulsifier compositions for invert emulsion fluids and methods of using the same
US-2018223165-A1 · Aug 9, 2018 · US
Spacer fluid compositions, methods, and systems for aqueous based drilling mud removal
US-2018223167-A1 · Aug 9, 2018 · US
Invert emulsion based drilling fluid and methods of using same
US-2018223166-A1 · Aug 9, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B2201/20?
- CPC C04B2201/20 is the Cooperative Patent Classification code for “for the density.”
- How many patents are filed under CPC C04B2201/20 (for the density)?
- Our database includes 337 publications tagged with this CPC code.
- Is patent activity under CPC C04B2201/20 growing?
- Publication counts under this code: 47 in 2024 vs 42 in 2025 (latest complete years).