US3632702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a thick thermoplastic slab
Assignee: Phillips Petroleum Co
•
Filing: 1968-11-22
•
Granted: 1972-01-04
•
Expires: 1988-11-22
Abstract
Abstract A METHOD FOR FORMING A THICK THERMOPLASTIC SLAB IS PROVIDED WHEREIN THE SLAB IS EXTRUDED AT A PREDERTIMED SPEED OF AT LEAST 6" PER MINUTE AND THE SLAB EXTRUDATE TEMPERATURE, WHEN DISCHARGED FROM THE EXTRUSION DIE, IS AT LEAST APPROXIMATELY 300*F. THE SLAB EXTRUDATE, UPON BEING DISCHARGED, IS SUPPORTED IN A SUBSTANTIALLY HORIZONTAL PLANE AND, WHILE SO SUPPORTED, IS CONVEYED AWAY FROM THE EXTRUSION DIE AT APPROXUMATELY THE SAME SPEED AS THE SPEED OF DISCHARGE OF THE EXTRUDATE FROM THE DIE.
Inventors
- 👤 Guy E Carrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:18
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/475; B29C48/03; B29C48/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |