Patent US3813462A successfully refreshed from Google Patents.
US3813462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of molded articles
Assignee: Individual
•
Filing: 1971-05-10
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Granted: 1974-05-28
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Expires: 1991-05-10
Abstract
Abstract PROCESS FOR PREPARING RIGID, IMPACT-RESISTANT ARTICLE COMPRISING A HOLLOW OUTER SHELL COMPONENT AND AN INNER RIGIDIFIER COMPONENT COMRPISING A CELLULAR PLASTIC MATERIAL. THE ARTICLE IS FORMED BY PREPARING SEPARATELY (1) A PREMOLED SKIN FROM A PLIABLE PLASTIC MATERIAL, AND (2) A PLASTIC COMPOSITION HAVING FOAMING CAPABILITY. THE PLASTIC COMPOSITION IS POURED OR SPRAYED INTO A PREMOLDED SHELL COMPONENT AND FOAMS IN PLACE INSIDE THE CAVITY OF THE SHELL COMPONENT. THE RESULTING CELLULAR STRUCTURE IS SOLIDIFIED AND BECOMES RIGID. THE ARTICLE IS RECOVERED.
Inventors
- 👤 A Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:27
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/003; B29C70/0035; B29K; B29K2105/00; B29K2105/06; B29K2309/00; B29K2309/08
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |