Enhanced oil recovery method using a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid
US-11180446-B2 · Nov 23, 2021 · US
the nitrogen atom of at least one of the amino groups being part of any of the groups [IMAGE cpc-sch-C07C-0975.gif], X being a hetero atom, Y being any atom
the nitrogen atom of at least one of the amino groups being part of any of the groups [IMAGE cpc-sch-C07C-0975.gif], X being a hetero atom, Y being any atom · 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 | C07C309/15 |
| Official title | the nitrogen atom of at least one of the amino groups being part of any of the groups [IMAGE cpc-sch-C07C-0975.gif], X being a hetero atom, Y being any atom |
| Display label | the nitrogen atom of at least one of the amino groups being part of any of the groups [IMAGE cpc-sch-C07C-0975.gif], X being a hetero atom, Y being any atom |
| Total patents | 107 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 6 |
| 2017 | 6 |
| 2018 | 8 |
| 2019 | 2 |
| 2020 | 20 |
| 2021 | 11 |
| 2022 | 13 |
| 2023 | 13 |
| 2024 | 9 |
| 2025 | 7 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compound comprising certain level of bio-based carbon
US-11142494-B2 · Oct 12, 2021 · US
Amide compounds, pharmaceutical compositions thereof, and methods of using the same
US-2021284599-A1 · Sep 16, 2021 · US
Photo-Cleavable Surfactants
US-2021253519-A1 · Aug 19, 2021 · US
Method of enhanced conversion of taurine salts to alkyl taurate amides
US-11059776-B2 · Jul 13, 2021 · US
Phenyl urea derivatives as n-formyl peptide receptor modulators
US-2021179550-A1 · Jun 17, 2021 · US
Enhanced conversion of taurine to alkyl taurate amide using phosphoric acid catalysts
US-2021163405-A1 · Jun 3, 2021 · US
Fracturing fluid comprising a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropane sulphonic acid and hydraulic fracturing method
US-10968171-B2 · Apr 6, 2021 · US
Derivatives of sobetirome
US-2021002208-A1 · Jan 7, 2021 · US
Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid
US-2020377449-A1 · Dec 3, 2020 · US
Modulators of the prostacyclin (pgi2) receptor useful for the treatment of disorders related thereto
US-2020375930-A1 · Dec 3, 2020 · US
Actinic ray-sensitive or radiation-sensitive resin composition, resist film, pattern forming method, and method for manufacturing electronic device
US-10802399-B2 · Oct 13, 2020 · US
Method of enhanced conversion of taurine salts to alkyl taurate amides
US-2020283379-A1 · Sep 10, 2020 · US
Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid
US-10759746-B2 · Sep 1, 2020 · US
Cleavable surfactants
US-2020263110-A1 · Aug 20, 2020 · US
Fluorescent probe, preparation method therefor and use thereof
US-2020248069-A1 · Aug 6, 2020 · US
Polymerase inhibitors and related compositions and methods
US-2020199088-A1 · Jun 25, 2020 · US
Method for producing 2-acrylamido-2-methylpropane sulphonic acid
US-10669231-B2 · Jun 2, 2020 · US
Modulators of the prostacyclin (PGI2) receptor useful for the treatment of disorders related thereto
US-10668033-B2 · Jun 2, 2020 · US
Method for producing the 2-acrylamido-2-methylpropane sulfonic acid monomer and polymer comprising said monomer
US-10662149-B2 · May 26, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C309/15?
- CPC C07C309/15 is the Cooperative Patent Classification code for “the nitrogen atom of at least one of the amino groups being part of any of the groups [IMAGE cpc-sch-C07C-0975.gif], X being a hetero atom, Y being any atom.”
- How many patents are filed under CPC C07C309/15 (the nitrogen atom of at least one of the amino groups being part of any of the groups [IMAGE cpc-sch-C07C-0975.gif], X being a hetero atom, Y being any atom)?
- Our database includes 107 publications tagged with this CPC code.
- Is patent activity under CPC C07C309/15 growing?
- Publication counts under this code: 9 in 2024 vs 7 in 2025 (latest complete years).