US3692602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a thermoplastic resin foam
Assignee: Toray Industries Inc
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Filing: 1969-06-23
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Granted: 1972-09-19
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Expires: 1989-06-23
Abstract
Abstract A PROCESS FOR MAKING THERMOPLASTIC RESIN FOAM COMPRISING FORMING A LAMINATE COMPRISED OF A SHEET OF FOAMABLE THERMOPLASTIC INTERPOSED BETWEEN AND BONDED TO OUTER THERMOPLASTIC RESIN FILMS. WHEN THE LAMINATE IS HEATED, A FOAM PRODUCT IS FORMED WHICH, BECAUSE THE OUTER FILMS LIMIT THE ESCAPE OF FOAMING GAS, MAY BE THINNER AND/OR HAVE HIGHER EXPANSION RATIOS THAN THERMOPLASTIC RESIN FOAMS HERETOFORE PRODUCIBLE BY ANY OTHER ATMOSPHERIC PROCESS.
Inventors
- 👤 Hiroshi Okada
- 👤 Atsushi Osakada
- 👤 Satoyuki Minami
- 👤 Toshikazu Aoki
- 👤 Tetsuo Hisamori
- 👤 Hironobu Koyanagi
- 👤 Hiromi Otsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:23
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B32B27/18; B32B27/26; B32B27/30; B32B27/304; B32B27/32; B32B5/00; B32B5/18; C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/34; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0235; B32B2266/025; B32B2305/00; B32B2305/72; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/16; Y10S264/18
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |