US3779970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickened latex coatings with improved flow and leveling properties
Assignee: Dow Chemical Co
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Filing: 1972-03-13
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Granted: 1973-12-18
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Expires: 1992-03-13
Abstract
Abstract THE IMPROVEMENTS OF THIS INVENTION ARE OBTAINED BY ADDING TO A LATEX COATING A WATER SOLUBLE SALT OF A POLYMERIC MATERIAL WHICH IS AN ESTER OF A CARBOXYLIC POLYMER HAVING ABOUT 28 TO 62.5 WEIGHT PERCENT OF PENDANT CARBOXYLIC ACID GROUPS (-COOH) AND CERTAIN NONIONIC SURFACTANTS WHEREIN ABOUT 0.5 TO 10 PERCENT OF THE ACID GROUPS ARE ESTERIFIED WITH THE SURFACTANT.
Inventors
- 👤 S Evani
- 👤 R Lalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:09
CPC Classifications
C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D7/00; C09D7/40; C09D7/43; C08; C08L; C08L25/00; C08L25/18
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |