Subterranean stimulation operations utilizing degradable pre-coated particulates
US-10876045-B2 · Dec 29, 2020 · US
Biopolymers
Biopolymers · 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 | C09K8/905 |
| Official title | {Biopolymers} |
| Display label | Biopolymers |
| Total patents | 81 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 14 |
| 2017 | 10 |
| 2018 | 6 |
| 2019 | 12 |
| 2020 | 8 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Phosphonated polysaccharides and gels and process for making same
US-10844140-B2 · Nov 24, 2020 · US
Treatment fluids comprising recycled drilling cuttings and method of use
US-10717913-B2 · Jul 21, 2020 · US
Hydrogels of graft polymers for acid diversion
US-10703962-B2 · Jul 7, 2020 · US
Composition and method for improved treatment fluid
US-10633581-B2 · Apr 28, 2020 · US
Surfactant that changes the wettability of tight sandstone and its preparation method and application
US-10544353-B2 · Jan 28, 2020 · US
In-situ hydrogen sulfide mitigation
US-10465105-B2 · Nov 5, 2019 · US
In-situ hydrogen sulfide mitigation
US-2019309213-A1 · Oct 10, 2019 · US
Treatment fluids comprising recycled drilling cuttings and method of use
US-2019241789-A1 · Aug 8, 2019 · US
Polymeric drag reducing compositions and methods for reducing drag and/or increasing viscosity of fluids in oil and/or gas wells
US-2019241796-A1 · Aug 8, 2019 · US
Phosphonated polysaccharides and gels and process for making same
US-2019202941-A1 · Jul 4, 2019 · US
Proppant Materials for Additive Delivery
US-2019161672-A1 · May 30, 2019 · US
In situ generation of pH control agents
US-10301533-B2 · May 28, 2019 · US
Soluble & filterable biopolymer solids
US-2019106618-A1 · Apr 11, 2019 · US
Thickening of fluids
US-10240083-B2 · Mar 26, 2019 · US
Phosphonated polysaccharides and gels and process for making same
US-10239960-B2 · Mar 26, 2019 · US
Method for treating a subterranean formation
US-10214681-B2 · Feb 26, 2019 · US
Surfactant that changes the wettability of tight sandstone and its preparation method and application
US-2019031945-A1 · Jan 31, 2019 · US
IN SITU GENERATION OF pH CONTROL AGENTS
US-2018362839-A1 · Dec 20, 2018 · US
Hydrogels of graft polymers for acid diversion
US-2018362840-A1 · Dec 20, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/905?
- CPC C09K8/905 is the Cooperative Patent Classification code for “Biopolymers.”
- How many patents are filed under CPC C09K8/905 (Biopolymers)?
- Our database includes 81 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/905 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).