Modified maleic anhydride polymers and the like for use as scale inhibitors
US4919821A · kind A · utility
30Cited by
17References
6Claims
0Family size
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Key dates
| Filing date | Aug 31, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Water supplies are treated to inhibit the formation of scale deposits of alkaline earth phosphates, phosphonates, sulphates and carbonates using various hydrocarbon polymers which contain an amido functionality and which have been prepared by post-polymerization derivatization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.