Patent US3610228A successfully refreshed from Google Patents.
US2736064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
rubin
Assignee: —
•
Filing: —
•
Granted: 1956-02-28
•
Expires: 1973-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/87; B29C48/022; B29C48/03; B29C48/793; B29C48/80; B29C48/83; B29C48/832; B29K; B29K2027/00; B29K2027/12; B29K2027/18; Y; Y10; Y10S; Y10S264/00; Y10S264/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A PROCESS FOR SHAPING IN AN EXTRUSION MACHINE A THERMOPLASTIC MATERIAL COMPRISING A TRIFLUOROCHLOROETHYLENE POLYMER, THE STEPS WHICH COMPRISES: HEATING SAID MATERIAL; MOVING SAID HEATED MATERIAL THROUGH AN EXTRUSION CHAMBER; EXTRUDING SAID HEATED MATERIAL THROUGH A DIE LAND AT A PREDETERMINED EXTRUSION PRESSURE AND EXTRUSION TEMPERATURE ABOVE ITS CONVERSION POINT; PASSING SAID HEATED EXTRUDED MATERIAL DIRECTLY INTO AND THROUGH A SECOND DIE PROVIDED WITH COOLING MEANS, SAID SECOND DIE HAVING A CROSS-SECTION NOT LARGER THAN THE CROSS-SECTION OF SAID FIRST DIE AND BEING INSULATED FROM SAID FIRST DIE, WHEREBY TRANSFER OF HEAT FROM SAID FIRST DIE IS SUBSTANTIALLY REDUCED; AND IN SAID SECOND DIE COOLING SAID EXTRUDED MATERIAL THROUGH A CRITICAL RANGE EXTENDING FROM ITS CONVERSION POINT TO AT LEAST ABOUT 25* F. THEREBELOW.
Claim 2
Dependent Claim
125 words
IN A PROCESS FOR SHAPING IN AN EXTRUSION MACHINE A THERMOPLASTIC MATERIAL COMPRISING A TRIFLUOROCHLOROETHYLENE POLYMER, THE STEPS WHICH COMPRISES: HEATING SAID MATERIAL; MOVING SAID HEATED MATERIAL THROUGH AN EXTRUSION CHAMBER; EXTRUDING SAID HEATED MATERIAL THROUGH A DIE LAND AT A PREDETERMINED EXTRUSION PRESSURE AND EXTRUSION TEMPERATURE ABOVE ITS CONVERSION POINT; PASSING SAID HEATED EXTRUDED MATERIAL DIRECTLY INTO AND THROUGH A SECOND DIE PROVIDED WITH COOLING MEANS, SAID SECOND DIE HAVING A CROSS-SECTION NOT LARGER THAN THE CROSS-SECTION OF SAID FIRST DIE AND BEING INSULATED FROM SAID FIRST DIE, WHEREBY TRANSFER OF HEAT FROM SAID FIRST DIE IS SUBSTANTIALLY REDUCED; AND IN SAID SECOND DIE COOLING SAID EXTRUDED MATERIAL THROUGH A CRITICAL RANGE EXTENDING FROM ITS CONVERSION POINT TO AT LEAST ABOUT 25* F. THEREBELOW.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |