Patent US2423707A successfully refreshed from Google Patents.
Patent US2780604A successfully refreshed from Google Patents.
US3304352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the extrusion of tubing
Assignee: Individual
•
Filing: 1963-04-08
•
Granted: 1967-02-14
•
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 00:52
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
Cited
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 |