US3553300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling the upper surface contour of foamable polyurethane during expansion in an open top mold
Assignee: GFC FOAM Corp A CORP OF DE
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Filing: 1968-07-10
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Granted: 1971-01-05
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Expires: 1988-07-10
Abstract
Abstract A CONTINUOUS MOLDING PROCESS FOR CONTROLLING THE UPPER CONTOUR OF POLYURETHANE FOAMED ARTICLES INCLUDING AN OPEN TOPPED TROUGH-LIKE CONVEYOR INTO WHICH A REACTION MIXTURE IS POURED AND TOP PRESSURE MEANS WHICH PRESS DOWN ON ABOUT THE CENTER TWO THIRDS OF THE RISING FOAMING MIXTURE DURING SELECTED PORTIONS OF THE FOAM RISE PROCESS.
Inventors
- 👤 Fred Buff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:18
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/467; Y; Y10; Y10S; Y10S264/00; Y10S264/84
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |