Phosphonated polysaccharides and gels and process for making same
US10844140B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Mar 6, 2019 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Mar 6, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Products and processes that are related to phosphonated polysaccharide compositions, including phosphonated polysaccharide gels, having a substituent degree of substitution with a lower limit of 0.02 and an upper limit of 3, and having a weight average molecular weight with an upper limit of 5,000,000 g/mole, as well as to oil field application or fracturing fluid compositions comprising such phosphonated polysaccharide compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.