Patent US3303252A successfully refreshed from Google Patents.
US3303252A
Expired / Lapsed
US
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Method of forming products extruded from plastic material
Assignee: Philadelphia Insulated Wire Co
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Filing: 1963-03-19
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Granted: 1967-02-07
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Expires: 1983-03-19
Abstract
No abstract record available.
Inventors
- 👤 Rogers Gerson George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:08
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/05; B29C48/06; B29C48/12; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF FORMING PRODUCTS EXTRUDED FROM PLASTIC MATERIAL SUCH AS POLYETERAFLUOROETHYLENE, WHICH COMPRISES THE STEPS OF MOLDING UNDER PRESSURE AN ELONGATEE BODY OF SUCH MATERIAL TO BE USED AS AN EXTRUSION PREFORM, PLACING SAID ELONGATED BODY INTO AN EXTRUSION CYLINDER, THE PREFORM BEING MADE WITH A CROSS-SECTIONAL AREA WHICH IS LESS THAN THAT OF THE INTERIOR OF THE EXTRUSION CYLINDER SO AS TO PROVIDE A FREE SPACE EXTENDING FROM END TO END OF THE PREFORM, INTRODUCING INTO SAID SPACE A LOOSE MATERIAL HAVING CHARACTERISTICS DIFFERING FROM THOSE OF THE MATERIAL OF THE PREFORM, AND THEREAFTER OPERATING THE EXTRUSIN CYLINDRE TO FORM AN EXTRUDED PRODUCT COMPRISED OF A COMPOSITE OF THE PRESSURE-MOLDED BODY AND THE PLASTIC MATERIAL INTRODUCED INTO SAID SPACE.
Claim 2
Independent Claim
121 words
THE METHOD OF FORMING PRODUCTS EXTRUDED FROM PLASTIC MATERIAL SUCH AS POLYETERAFLUOROETHYLENE, WHICH COMPRISES THE STEPS OF MOLDING UNDER PRESSURE AN ELONGATEE BODY OF SUCH MATERIAL TO BE USED AS AN EXTRUSION PREFORM, PLACING SAID ELONGATED BODY INTO AN EXTRUSION CYLINDER, THE PREFORM BEING MADE WITH A CROSS-SECTIONAL AREA WHICH IS LESS THAN THAT OF THE INTERIOR OF THE EXTRUSION CYLINDER SO AS TO PROVIDE A FREE SPACE EXTENDING FROM END TO END OF THE PREFORM, INTRODUCING INTO SAID SPACE A LOOSE MATERIAL HAVING CHARACTERISTICS DIFFERING FROM THOSE OF THE MATERIAL OF THE PREFORM, AND THEREAFTER OPERATING THE EXTRUSIN CYLINDRE TO FORM AN EXTRUDED PRODUCT COMPRISED OF A COMPOSITE OF THE PRESSURE-MOLDED BODY AND THE PLASTIC MATERIAL INTRODUCED INTO SAID SPACE.
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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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |