US3092874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of thermoplastic polymeric film
Assignee: EIDP Inc
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Filing: 1961-07-17
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Granted: 1963-06-11
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Fallwell Ernest Lynwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:24
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/908; B29C48/03; B29C48/09; B29C48/10; B29C48/901; B29C48/902; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92209; B29C2948/92314; B29C2948/92323; B29C2948/92428; B29C2948/92504; B29C2948/92514; B29C2948/92809; B29C2948/92819; B29C2948/92923; B29C48/001; B29C48/0018; B29C48/0019
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
IN AN APPARATUS COMPRISING IN COMBINATION MEANS FOR EXTRUDING THERMOPLASTIC ORGANIC MATERIAL IN THE FORM OF A CONTINUOUS TUBING, SAID MEANS INCLUDING A DIE HAVING AN ANNULAR EXTRUSION ORIFICE, A MANDREL OF SUBSTANTIALLY CIRCULAR CROSS-SECTION POSITIONED ADJACENT TO SAID OIFICE AND COAXIAL THEREWITH, SAID MANDREL COMORISING AT LEAST A FIRST PORTION OF GRADUALLY INCREASING DIAMETER AND A SECOND PORTION OF NON-INCREASING DIAMETER, MEANS FOR ADVANCING CONTINUOUS TUBING EXRUDED FROM SAID ORFICE OVER AND PAST SAID MANDREL, VALVED MEANS FOR SUPPLYING A BASEOUS MEDIUM WITHIN THE TUBING BETWEEN SAID ORIFICE AND SAID MANDREL AT A PRESSURE EFFECTIVE TO INCREASE THE DIAMETER OF THE TUBING WHILE IN THE FORMATIVE STATE AND TO MAINTAIN SAID TUBING JUST OUT OF PHYSICAL CONTACT WITH SAID MANDREL, AND MEANS FOR MAINTAINING SAID MANDREL AT A PREDETERMINED REDUCED TEMPERATURE TO RENDER SAID MANDREL EFFECTIVE TO COOL TUBING PASSING THEREOVER; THE IMPROVEMENT WHICH COMPRISES, IN COMBINATON, TEMPERA-
References Cited (Backward Citations)
US2966700A
Cited
US2987765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |