US3600335A
Expired / Lapsed
US
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Modified polyvinyl chloride foams,preparation thereof and applications therefor
Assignee: Mitsubishi Chemical Corp
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Filing: 1967-12-15
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Granted: 1971-08-17
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Expires: 1987-12-15
Abstract
Abstract COLORLESS POLYVINYL CHLORIDE FOAMS OF GREATLY ENHANCED SOFTNESS AND ELASTICITY, AND WITH GREATLY IMPROVED FINENESS AND UNIFORMITY OF CELL DISTRIBUTION, ARE OBTAINED BY BLENDING 30 TO 150 PARTS BY WEIGHT OF THE TOTAL AMOUNT OF A VINYL ACETATE-ETHYLENE COPOLYMER WITH A VINYL ACETATE CONTENT OF 30% TO 80% BY WEIGHT AND A LIQUID PLASTICIZER IN THE PROPORTION OF 3% TO 60% BY WEIGHT OF THE FORMER IN THE TOTAL AMOUNT OF BOTH TOGETHER WITH 100 PARTS BY WEIGHT OF A POLYVINYL CHLORIDE RRESIN AND BY HEATING THE WEIGHT OF A POLYVINYL CHLORIDE RRESIN AND BY HEATING THE OBTAINED RESINOUS MIXTURE TO AN ELEVATED TEMPERATURE AT WHICH THE FOAMING AGENT SO DECOMPOSES AS TO BE FOAMED.
Inventors
- 👤 Michio Fukushima
- 👤 Motoshi Mitarai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:49
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; D; D06; D06N; D06N3/00; D06N3/04; D06N3/06; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2457/00; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S428/00; Y10S428/904; Y10T; Y10T442/00; Y10T442/30; Y10T442/3325
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |