Patent US3736240A successfully refreshed from Google Patents.
US3736240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post-chlorinated vinyl chloride resin and process therefor using radiation
Assignee: PACIFIC WESTERN RESIN Co
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Filing: 1970-12-28
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Granted: 1973-05-29
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Expires: 1990-12-28
Abstract
Abstract POST-CHLORINATED POLYVINYL CHLORIDE RESIN HAVING HIGH THERMAL STABILITY, HEAT DEFECTION TEMPERATURE AND IMPACT STRENGTH, TOGETHER WITH AN AQUEQUATE MELT FLOW RATE, IS PREPARED BY CHLORINATING VINYL CHLORIDE HOMOPOLYMER OF VINYL CHLORIDE-ETHYLENE OR PROPYLENE INTERPOLYMER, WHILE IRRADIATED WITH ULTRAVIOLET LIGHT IN A CHLOROFORM SOLUTION, TO A CHLORINE CONTENT OF AT LEAST ABOUT 65 WEIGHT PERCENT.
Inventors
- 👤 L Weintraub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:54
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |