Patent US3576914A successfully refreshed from Google Patents.
US3576914A
Expired / Lapsed
US
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Thermal dehydrochlorination of poly-vinyl chloride and graft copolymers therefrom
Assignee: Goodrich Corp
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Filing: 1969-05-26
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Granted: 1971-04-27
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Expires: 1989-05-26
Abstract
Abstract POROUS POLY(VINYL CHLORIDE) RESIN IS SUBJECTED TO A SPECIFIC METHOD OF DEHYDROCHLORINATION. THIS UNSATURATED MATERIAL IS THEN CONVERTED BY GRAFT POLYMERIZATION TO BITHERTO UNATTAINABLE LEVELS OF PERCENT GRAFTING EFFICIENCIES.
Inventors
- 👤 Frank J Donat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:53
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08F259/04; C08F8/00; C08F8/26
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |