Patent US3304352A successfully refreshed from Google Patents.
US3304352A
Expired / Lapsed
US
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Method for the extrusion of tubing
Assignee: Individual
•
Filing: 1963-04-08
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Granted: 1967-02-14
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Gerow Milo Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:37
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C48/001; B29C48/0022; B29C48/03; B29C48/09; B29C48/10; B29C2793/00; B29C2793/0063; B29C48/0018; B29C48/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A METHOD FOR EXTRUSION OF TUBING AND SHEETING IN WHICH HEATED SYNTHETIC RESINOUS THERMOPLASTIC TUBING IS DIE-EXTRUDED IN NON-SELF-SUSTAINING CONDITION AND A FLUID UNDER PRESSURE IS SUPPLIED WITHIN SAID TUBING TO SUPPORT SAID TUBING, AND WHICH INCLUDES REDUCING SAID PRESSURE IN A REDUCED PRESSURE ZONE TO ELIMINATE SUBSTANTIALLY ANY POSSIBILITY OF SURGE, AND THE PRESSURE IN THE REDUCED PRESSURE ZONE IS BALANCED AGAINST A WEIGHT EQUAL SUBSTANTIALLY TO THAT OF A PING-PONG BALL, AND IN WHICH THE SUPPORTING FLUID IS CIRCULATED WITHIN THE TUBING TO PREVENT ITS COLLAPSE, AND THE TUBING IS PASSED THROUGH A MODIFYING AND SIZING ZONE TO SIZE AND AT LEAST PARTIALLY SET THE EXTRUDED TUBING.
Claim 2
Dependent Claim
110 words
IN A METHOD FOR EXTRUSION OF TUBING AND SHEETING IN WHICH HEATED SYNTHETIC RESINOUS THERMOPLASTIC TUBING IS DIE-EXTRUDED IN NON-SELF-SUSTAINING CONDITION AND A FLUID UNDER PRESSURE IS SUPPLIED WITHIN SAID TUBING TO SUPPORT SAID TUBING, AND WHICH INCLUDES REDUCING SAID PRESSURE IN A REDUCED PRESSURE ZONE TO ELIMINATE SUBSTANTIALLY ANY POSSIBILITY OF SURGE, AND THE PRESSURE IN THE REDUCED PRESSURE ZONE IS BALANCED AGAINST A WEIGHT EQUAL SUBSTANTIALLY TO THAT OF A PING-PONG BALL, AND IN WHICH THE SUPPORTING FLUID IS CIRCULATED WITHIN THE TUBING TO PREVENT ITS COLLAPSE, AND THE TUBING IS PASSED THROUGH A MODIFYING AND SIZING ZONE TO SIZE AND AT LEAST PARTIALLY SET THE EXTRUDED TUBING.
References Cited (Backward Citations)
US1828888A
Cited
US1803043A
Cited
US2085840A
Cited
US2581242A
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US2688773A
Cited
US2668324A
Cited
US2720680A
Cited
US2925621A
Cited
US2876497A
Cited
US3084386A
Cited
US3068517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |