US3651035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of alkyl styrenes and nvinyl heterocyclic monomers and inverse suspension polymerization using the same
Assignee: Dow Chemical Co
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Filing: 1970-03-12
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Granted: 1972-03-21
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Expires: 1990-03-12
Abstract
Abstract THIS INVENTION RELATES TO A NEW INTERPOLYMERIC COMPOSITION OF MATTER AND PARTICULARLY TO COPOLYMERS OF CERTAIN ALKYL SUBSTITUTED ALKENYL AROMATIC MONOMERS AND N-VINYL HETEROCYCLIC MONOMERS. THE NEW COPOLYMERS FIND UTILITY AS SUSPENDING AGENTS FOR WATER-IN-OIL DISPERSIONS AND AS WATER DISPERSIBLE COATINGS.
Inventors
- 👤 Bobby Leroy Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:56
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; C08F26/00; C08F26/06; C08F226/00; C08F226/06; C08F226/10
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |