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US3560599A
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US
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Method of regulating the upper surface contour of polyurethane foam
Assignee: GFC FOAM Corp A CORP OF DE
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Filing: 1968-08-05
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Granted: 1971-02-02
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Expires: 1988-08-05
Abstract
Abstract CONTROL OF UPPER CONTOUR OF FOAMED POLYURETHANE MATERIALS FORMED IN AN OPEN TOP MOLD BY SELECTIVE CONTROL OF LATERAL PRESSURE TO THE RISING FOAM BY MOVEMENT OF THE MOLD''S SIDE TOWARD ONE ANOTHER IN A MANNER DECREASING THE OVERALL WIDTH OF SAID FOAM.
Inventors
- 👤 Charles Ferstenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:26
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/467; Y; Y10; Y10S; Y10S264/00; Y10S264/84
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |