US3600336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resin foam and a method of preparing the same
Assignee: Toray Industries Inc
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Filing: 1968-02-19
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Granted: 1971-08-17
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Expires: 1988-02-19
Abstract
Abstract A POLYAMIDE RESIN FOAM COMPRISING A POLYAMIDE RESIN BASE CROSS-LINKED WITH AN ORGANIC COMPOUND HAVING IN THE MOLECULE AT LEAST TWO REACTIVE UNSATURATED DOUBLE BONDS. A METHOD OF PREPARING A POLYAMIDE RESIN FOAM WHICH COMPRISES UNIFORMLY MIXING A POLYAMIDE WITH AN ORGANIC COMPOUND HAVING IN THE MOLECULE AT LEAST TWO REACTIVE UNSATURATED DOUBLE BONDS AND A CHEMICAL FOAMING AGENT AT A TEMPERATURE HIGHER THAN THE SOFTENING POINT OF SAID POLYAMIDE, IRRADIATING SAID MIXTURE WITH IONZING RAYS TO EFFECT A CROSS-LINKING OF THE POLYAMIDE, AND HEATING THE MIXTURE TO A TEMPERATURE HIGHER THAN THE DECOMPOSITION TEMPERATURE OF SAID FOAMING AGENT TO CAUSE FOAMING.
Inventors
- 👤 Hiroshi Okada
- 👤 Atsushi Osakada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:28
CPC Classifications
C; C08; C08G; C08G69/00; C08F; C08F283/00; C08F283/04; C08J; C08J9/00; C08J9/04; C08J9/06; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/18; Y10S521/00; Y10S521/916
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) | 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 |