Patent US4668715A successfully refreshed from Google Patents.
US4668715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid solubilization of dry polymers
Assignee: ChampionX LLC
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Filing: 1985-12-05
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Granted: 1987-05-26
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Expires: 2005-12-05
Abstract
Abstract A method of rapidly dissolving finely divided individual particles of water-soluble vinyl addition polymers which comprises adding to water which contains from 0.5 to 10% by weight of a water-soluble surfactant, dry particles of a vinyl addition polymer, which particles have been coated with an oil-soluble emulsifier to provide a discrete organic solvent-free coating about such individual particles, having an HLB value between 4 and 9.
Inventors
- 👤 Kenneth G. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08J2300/00; C08J2300/10; Y; Y10; Y10S; Y10S524/00; Y10S524/916; Y10S524/922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
The method of rapidly dissolving a water-soluble vinyl addition polymer having a molecular weight of at least 1,000,000 which comprises adding to water which contains from 0.5 to 10% by weight of a water-soluble surfactant having a HLB number within the range of 8-40, particles of the water-soluble vinyl addition polymer having a particle size not greater than 50 mesh, which contain a discrete coating free of organic solvent consisting essentially of an oil-soluble emulsifier having an HLB number between 4 and 9, the amount of said emulsifier being about 0.01% about 20% by weight of the particles.
Claim 2
Independent Claim
98 words
The method of rapidly dissolving a water-soluble vinyl addition polymer having a molecular weight of at least 1,000,000 which comprises adding to water which contains from 0.5 to 10% by weight of a water-soluble surfactant having a HLB number within the range of 8-40, particles of the water-soluble vinyl addition polymer having a particle size not greater than 50 mesh, which contain a discrete coating free of organic solvent consisting essentially of an oil-soluble emulsifier having an HLB number between 4 and 9, the amount of said emulsifier being about 0.01% about 20% by weight of the particles.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the oil-soluble emulsifier has an HLB number less than 5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |