Water-in-oil emulsions of polymers of quaternary ammonium compounds of the acrylamido type
US4343730A · kind A · utility
27Cited by
3References
25Claims
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Key dates
| Filing date | Mar 9, 1981 |
| Grant date | Aug 10, 1982 |
| Priority date | — |
| Expiry date | Mar 9, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/923
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Water-in-oil emulsions of homopolymers and copolymers of acrylamido alkylene quaternary ammonium salts and their use as sewage treatment acids, demulsifying agents, water clarification aids, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.