US3591568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process
Assignee: Occidental Chemical Corp
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Filing: 1969-01-06
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Granted: 1971-07-06
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Expires: 1989-01-06
Abstract
Abstract PROCESS FOR PRODUCTION OF SOLUTION-GRADE POLY(VINYL CHLORIDE-VINYL ACETATE) COPOLYMERS BY SUSPENSION POLYMERIZATION OF VINYL CHLORIDE AND VINYL ACETATE MONOMERS IN THE RPESENCE OF AN ALKYLATED POLY(VINYL PYRROLIDONE) AS A PROTECTIVE COLLOID AND UTILIZING INCREMENTAL ADDITION OF MONOMERIC VINYL CHLORIDE TO THE REACTION MIXTURE.
Inventors
- 👤 Elliott Farber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:14
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |