Method of using combined set-delayed cement compositions
US-10160900-B2 · Dec 25, 2018 · US
Density increasing or weighting additives
Density increasing or weighting additives · 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 | C09K8/48 |
| Official title | Density increasing or weighting additives |
| Display label | Density increasing or weighting additives |
| Total patents | 195 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 10 |
| 2017 | 17 |
| 2018 | 33 |
| 2019 | 30 |
| 2020 | 24 |
| 2021 | 16 |
| 2022 | 14 |
| 2023 | 13 |
| 2024 | 18 |
| 2025 | 8 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods and compositions including a curable resin and organophilically-modified clay for subterranean oil well applications
US-10144858-B2 · Dec 4, 2018 · US
Dispersant in cement formulations for oil and gas wells
US-2018312439-A1 · Nov 1, 2018 · US
Weighted fluids for treatment of subterranean formations
US-2018298266-A1 · Oct 18, 2018 · US
Dispersant in cement formulations for oil and gas wells
US-2018282216-A1 · Oct 4, 2018 · US
Rare earth-containing compounds to enhance performance of downhole treatment compositions
US-10087354-B2 · Oct 2, 2018 · US
Nanoclay-enhanced cement composition for deep well treatment
US-10065890-B2 · Sep 4, 2018 · US
Methods for producing fluid invasion resistant cement slurries
US-10047587-B2 · Aug 14, 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
Well cementing compositions and methods
US-2018148630-A1 · May 31, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/48?
- CPC C09K8/48 is the Cooperative Patent Classification code for “Density increasing or weighting additives.”
- How many patents are filed under CPC C09K8/48 (Density increasing or weighting additives)?
- Our database includes 195 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/48 growing?
- Publication counts under this code: 18 in 2024 vs 8 in 2025 (latest complete years).