US3755208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Avoidance of cell collapse in an extrusion process for a copolymer based on a low molecular weight {60 -olefin and polar vinyl monomer
Assignee: Haskon Inc
•
Filing: 1970-10-23
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Granted: 1973-08-28
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Expires: 1990-10-23
Abstract
Abstract Post extrusion cell collapse of vinyl copolymer foams is prevented by incorporation of a small amount of a partial ester of a long chain fatty acid and a polyol.
Inventors
- 👤 H Ehrenfreund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/13; Y10S521/00; Y10S521/908
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
The process of claim 1 where the partial ester is a mixture of glycerol monostearate and glycerol distearate.
References Cited (Backward Citations)
US3067147A
Cited
US3177174A
Cited
US3222304A
Cited
US3461088A
Cited
US3644230A
Cited
US3541040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |