US3142865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing thermoplastic tubing and sheeting
Assignee: OI Glass Inc
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Filing: 1961-10-26
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Granted: 1964-08-04
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Carlton A Richie
- 👤 Anthony J Scalora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:07
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; B29C48/001; B29C48/0018; B29C48/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD FOR PRODUCING THERMOPLASTIC TUBING AND SHEETING COMPRISING THE STEPS OF EXTRUDING HEATED THERMOPLASTIC MATERIAL IN THE FORM OF CIRCULAR TUBING, PASSING THE EXTRUDED TUBING OVER A COOLING FORMER OF THE SIZE AND THE CONTOUR DESIRED IN THE FINAL TUBING, MAINTAINING A LOW PRESSURE GASEOUS MEDIUM IN THE TUBING BETWEEN THE POINTS OF EXTRUSION AND COOLING, COOLING SAID TUBING AS IT PASSES OVER SAID FORMER, MAINTAINING A LOW PRESSURE GASEOUS MEDIUM IN SAID TUBING BETWEEN SAID FORMER AND THE POINT OF COLLASPING OF SAID TUBING, CHANGING THE CROSS-SECTIONAL SHAPE OF SAID TUBING FROM CIRCULAR TO ELLIPTICAL, COLLAPSING SAID TUBING IN ORDER THAT THE LONGITUDINAL AXIS OF SAID TUBING IS NORMAL TO THE MAJOR AXIS OF SAID TUBING WHEN IN ELLIPTICAL FORM AND THEREAFTER COLLECTING SAID TUBING.
Claim 2
Independent Claim
127 words
A METHOD FOR PRODUCING THERMOPLASTIC TUBING AND SHEETING COMPRISING THE STEPS OF EXTRUDING HEATED THERMOPLASTIC MATERIAL IN THE FORM OF CIRCULAR TUBING, PASSING THE EXTRUDED TUBING OVER A COOLING FORMER OF THE SIZE AND THE CONTOUR DESIRED IN THE FINAL TUBING, MAINTAINING A LOW PRESSURE GASEOUS MEDIUM IN THE TUBING BETWEEN THE POINTS OF EXTRUSION AND COOLING, COOLING SAID TUBING AS IT PASSES OVER SAID FORMER, MAINTAINING A LOW PRESSURE GASEOUS MEDIUM IN SAID TUBING BETWEEN SAID FORMER AND THE POINT OF COLLASPING OF SAID TUBING, CHANGING THE CROSS-SECTIONAL SHAPE OF SAID TUBING FROM CIRCULAR TO ELLIPTICAL, COLLAPSING SAID TUBING IN ORDER THAT THE LONGITUDINAL AXIS OF SAID TUBING IS NORMAL TO THE MAJOR AXIS OF SAID TUBING WHEN IN ELLIPTICAL FORM AND THEREAFTER COLLECTING SAID TUBING.
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |