US3734873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid dissolving water-soluble polymers
Assignee: ChampionX LLC
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Filing: 1972-08-07
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Granted: 1973-05-22
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Expires: 1992-08-07
Abstract
Abstract WATER-SOLUBLE VINYL ADDITION POLYMERS MAY BE RAPIDLY DISSOLVED IN WATER BY FIRST DISPERSING THESE POLYMERS INTO A WATER-IN-OIL EMULSION AND THEN INVERTING THESE EMULSIONS IN WATER. THE INVERSION OF THE EMULSION RELEASES THE POLYMER INTO WATER AS A SOLUTION.
Inventors
- 👤 D Anderson
- 👤 A Frisque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:42
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C02; C02F; C02F1/00; C02F1/52; C02F1/5227; C02F1/54; C08J2300/00; C08J2300/10; Y; Y10; Y10S; Y10S507/00; Y10S507/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |