Patent US3566449A successfully refreshed from Google Patents.
US3566449A
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Apparatus for molding plastic foam
Assignee: Phillips Petroleum Co
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Filing: 1968-11-27
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Granted: 1971-03-02
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Expires: 1988-11-27
Abstract
Abstract SMOOTH-SURFACE, FOAMED PLASTIC ARTICLES ARE MADE BY CHARGING A FOAM MELT INTO A MOLD BETWEEN RESTRAINING ELASTIC SHEETS AND THEN RELEASING THE RESTRAINING FORCE TO ALLOW THE CHARGE TO EXPAND TO THE MOLD WALLS.
Inventors
- 👤 Robert R Goins
- 👤 Dan E Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:42
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/42; B29C44/424; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |