Method of cementing a well using delayed hydratable polymeric viscosifying agents
US-10822917-B2 · Nov 3, 2020 · US
Cellulose or derivatives thereof
Cellulose or derivatives thereof · 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 | C09K8/10 |
| Official title | Cellulose or derivatives thereof |
| Display label | Cellulose or derivatives thereof |
| Total patents | 117 |
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 | 5 |
| 2016 | 7 |
| 2017 | 17 |
| 2018 | 13 |
| 2019 | 15 |
| 2020 | 23 |
| 2021 | 17 |
| 2022 | 4 |
| 2023 | 8 |
| 2024 | 3 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Permeable and Decomposable Plug Forming Rapidly Dehydrating Fluid (RDF)
US-2020317988-A1 · Oct 8, 2020 · US
Subterranean formation processing composition comprising ultrafine cellulose fibers
US-10550305-B2 · Feb 4, 2020 · US
Petrified cellulosic materials as additives to treatment fluids
US-2019345371-A1 · Nov 14, 2019 · US
Cellulose nanofibers in extended cement systems
US-2019309211-A1 · Oct 10, 2019 · US
Drilling fluid additives and fracturing fluid additives containing cellulose nanofibers and/or nanocrystals
US-2019249066-A1 · Aug 15, 2019 · US
Acid-soluble plug forming rapidly dehydrating loss control slurry
US-2019177598-A1 · Jun 13, 2019 · US
Acid-soluble plug forming rapidly dehydrating loss control slurry
US-2019177597-A1 · Jun 13, 2019 · US
Acid-soluble plug forming rapidly dehydrating loss control slurry
US-2019177596-A1 · Jun 13, 2019 · US
Additive of chemically-modified cellulose nanofibrils or cellulose nanocrystals
US-10294403-B2 · May 21, 2019 · US
Loss Circulation Material for Seepage to Moderate Loss Control
US-2019144731-A1 · May 16, 2019 · US
Loss Circulation Material for Seepage to Moderate Loss Control
US-2019144730-A1 · May 16, 2019 · US
Polymer-based drilling fluids containing non-biodegradable materials and methods for use thereof
US-10233374-B2 · Mar 19, 2019 · US
Loss circulation material for seepage to moderate loss control
US-10233372-B2 · Mar 19, 2019 · US
Polymeric metal crosslinker for shear tolerant fracturing fluid application
US-10215008-B2 · Feb 26, 2019 · US
Nanofibril cellulose additive
US-2019048248-A1 · Feb 14, 2019 · US
Functionalized nanosilica as shale inhibitor in water-based fluids
US-2019010377-A1 · Jan 10, 2019 · US
Methods for treating a subterranean well
US-10174568-B2 · Jan 8, 2019 · US
Well treatment fluids comprising cross-linkable polysaccharides
US-10150910-B2 · Dec 11, 2018 · US
Petrified cellulosic materials as additives to treatment fluids
US-2018327647-A1 · Nov 15, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/10?
- CPC C09K8/10 is the Cooperative Patent Classification code for “Cellulose or derivatives thereof.”
- How many patents are filed under CPC C09K8/10 (Cellulose or derivatives thereof)?
- Our database includes 117 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/10 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).