US3701742A
Expired / Lapsed
US
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Vinyl chloride polymers and method of preparing same
Assignee: Occidental Chemical Corp
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Filing: 1970-10-29
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Granted: 1972-10-31
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Expires: 1990-10-29
Abstract
Abstract VINYL CHLORIDE POLYMERS HAVING ENHANCED POROSITY AND LOWER FISHEYE VALUES HAVE BEEN PREPARED BY AQUEOUS SUSPENSION POLYMERIZATION USING A COMBINATION OF HYDROXYPROPYL METHYL CELLULOSE AND HYDROXYETHYL CELLULOSE AS SUSPENDING AGENTS.
Inventors
- 👤 Dean E Richardson
- 👤 Adolph A Peterson
- 👤 Harold P Brady Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:19
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
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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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |