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US3661827A
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Method for preparing a water-dispersible acrylic copolymer
Assignee: NL SPENCER KELLOG Inc
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Filing: 1968-07-17
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Granted: 1972-05-09
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Expires: 1988-07-17
Abstract
Abstract WATER DISPERSIBLE COPOLYMERS ARE PREPARED AND DISPERSED OR DILUTED IN WATER WITHOUT THE USE OF EMULSIFIERS. A WATER DISPERSIBLE ACRYLIC COPOLYMER CAN BE PREPARED IN THE ABSENCE OF EMULSIFIERS BY THE COPOLYMERIZATION OF VINYL COMONOMERS (E.G. METHYL METHACRYLATE, STYRENE, AND ACRYLIC ACID) IN A MIXTURE OF WATER MISCIBLE ORGANIC SOLVENT, WATER AND A NEUTRALIZING AGENT (E.G. A TERTIARY AMINE SUCH AS TRIETHYL AMINE).
Inventors
- 👤 David D Taft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:29
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F220/20
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |