US3609809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die
Assignee: Phillips Petroleum Co
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Filing: 1968-11-06
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Granted: 1971-10-05
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Expires: 1988-11-06
Abstract
Abstract A DIE FOR THE EXTRUSION OF HOLLOW TUBING COMPRISES A HOUSING WITH A LONGITUDINAL INTERIOR OPENING WHICH DIVERGES OUTWARDLY FROM THE INLET AND CONVERGES TO THE DIE OUTLET. A HOLLOW TORPEDO IS SUPPORTED BY A SPIDER IN THE INLET SECTION OF THE HOUSING TO DEFINE AN ANNULAR PASSAGE, AND A HOLLOW CORE, ALSO SUPPORTED BY THE SPIDER, IS POSITIONED IN THE OUTLET SECTION OF THE HOUSING TO DEFINE AN ANNULAR PASSAGE. HEAT IS SUPPLIED TO THE HOUSING BY A PLURALITY OF HEATING ELEMENTS. A COOLING MEDIUM IS PASSED THROUGH THE INTERIOR OF THE TORPEDO AND THE CORE TO PERMIT ACCURATE CONTROL OF TEMPERATURE OF THE MATERIAL BEING EXTRUDED
Inventors
- 👤 Robert P Slicker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:53
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/872; B29C48/03; B29C48/09; B29C48/30; B29C48/32; B29C48/865; B29C48/87; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92209; B29C2948/92323; B29C2948/92361; B29C2948/92409; B29C2948/92504; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92904
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |