Patent US3640918A successfully refreshed from Google Patents.
US3640918A
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US
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Process for the manufacture of foam materials containing plasticizers and made of polyvinyl chloride and copolymers of vinyl chloride
Assignee: Dynamit Nobel AG
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Filing: 1969-04-07
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Granted: 1972-02-08
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Expires: 1989-04-07
Abstract
Abstract IMPROVEMENTS IN FORMING PLASTICIZED VINYL CHLORIDE POLYMER FOAMS BY ADMIXING VINYL CHLORIDE POLYMER PLASTISOLS WITH A SUBSTANTIALLY MOISTURE-FREE WETTING OR DISPERSING AGENT AT LEAST PARTIALLY DISSOLVED IN A FATTY ALCOHOL AND THEN FOAMING SUCH ADMIXTURE WITH A SUBSTANTIALLY INERT GAS.
Inventors
- 👤 Otto Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0004; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y10; Y10S; Y10S521/00; Y10S521/911
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |