Patent US3708445A successfully refreshed from Google Patents.
US3708445A
Expired / Lapsed
US
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Polymeric thickeners and method of preparing and using the same
Assignee: General Latex and Chemical Corp
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Filing: 1971-11-26
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Granted: 1973-01-02
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Expires: 1991-11-26
Abstract
Abstract A POLYMERIC SURFACTANT THICKENER COMPRISING A COPOLYMER OF AN ESTER OF AN ALKYLARYLPOLYETHER ALCOHOL, SUCH AS AN ALKYLPHENOXYPOLYETHYLENENEOXYETHANOL, WITH AN UNSATURATED CARBOXYLIC ACID COMPOUND, SUCH AS ACRYLIC OR METHACRYLIC ACID, AND AN UNSATURATED ACID COMPOUND, WHICH COPOLYMER COMPRISES FROM ABOUT 70 TO 95% OF THE ESTER AND FROM ABOUT 5 TO 30% OF THE UNSATURATED CARBOXYLIC ACID, AND WITH COPOLYMER CONTAINS FROM ABOUT 20 TO 100 OXYETHYLENE GROUPS. THE POLYMERIC SURFACTANT THICKENER IS PARTICULARLY USEFUL IN THICKENING POLYMERIC LATEX COMPOSITIONS, SUCH AS CARBOXYLATED STYRENE-BUTADIENE LATEX CONTAINING FILLER MATERIAL.
Inventors
- 👤 T Junas
- 👤 Torre A La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C08F8/00; C08F8/14; C08F8/44; C08L21/00; C08L21/02; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L31/00; C08L31/02; C08L31/04; C08L33/18; C08L33/20; C08L57/00; C08L2201/00; C08L2201/52; C08L33/02; C08L33/14; C08L35/00; C08L35/02; Y; Y10; Y10S; Y10S526/00; Y10S526/932
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |