US3244781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous extrusion and orientation of plastic tubing
Assignee: Remington Arms Co LLC
•
Filing: 1962-03-14
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Granted: 1966-04-05
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Expires: 1982-03-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert A Covington
- 👤 Rex E Dickey
- 👤 Nathaniel C Wyeth
- 👤 Edward M Yacko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:23
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/03; B29C48/09; B29C48/30; B29C48/32; B29C48/33; B29C48/34; B29C48/001; B29C48/0018; B29C48/0019; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF FORMING THERMOPLASTIC TUBING THAT IS CAPABLE OF RETAINING ITS TUBULAR FORM AND IS OF HIGH TENSILE STRENGTH IN THE LONGITUDINAL AND TRANSVERSE DIRECTIONS AND IS CAPABLE OF RESISTING HIGH RUPTURING FORCES IN BOTH THE LONGITUDINAL AND CIRCUMFERENTIAL DIRECTIONS, WHICH COMPRISES: (1) FORMING A THICK-WALLED RELATIVELY SMALL DIAMETER TUBE OF HIGHLY CRYSTALLINE THERMOPLASTIC MATERIAL WHICH IS A SUBSTANTIALLY LINEAR POLYMER HAVING AN ANNEALED DENSITY OF AT LEAST 0.94 AND AT LEAST 90% OF WHICH IS FORMED FROM ETHYLENE, (2) FORCING SAID TUBE UNDER PRESSURE THROUGH A TUBULAR SPACE FORMED BETWEEN A MANDREL AND A STATIONARY SURROUNDING DIE WHILE AT A MEAN TEMPERATURE AT WHICH IT MAY BE READILY ADVANCED UNDER THE PRESSURE EMPLOYED,
Claim 2
Independent Claim
115 words
A METHOD OF FORMING THERMOPLASTIC TUBING THAT IS CAPABLE OF RETAINING ITS TUBULAR FORM AND IS OF HIGH TENSILE STRENGTH IN THE LONGITUDINAL AND TRANSVERSE DIRECTIONS AND IS CAPABLE OF RESISTING HIGH RUPTURING FORCES IN BOTH THE LONGITUDINAL AND CIRCUMFERENTIAL DIRECTIONS, WHICH COMPRISES: (1) FORMING A THICK-WALLED RELATIVELY SMALL DIAMETER TUBE OF HIGHLY CRYSTALLINE THERMOPLASTIC MATERIAL WHICH IS A SUBSTANTIALLY LINEAR POLYMER HAVING AN ANNEALED DENSITY OF AT LEAST 0.94 AND AT LEAST 90% OF WHICH IS FORMED FROM ETHYLENE, (2) FORCING SAID TUBE UNDER PRESSURE THROUGH A TUBULAR SPACE FORMED BETWEEN A MANDREL AND A STATIONARY SURROUNDING DIE WHILE AT A MEAN TEMPERATURE AT WHICH IT MAY BE READILY ADVANCED UNDER THE PRESSURE EMPLOYED,
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |