US3239588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for tubular biaxial orientation
Assignee: Monsanto Co
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Filing: 1964-08-12
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Granted: 1966-03-08
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Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Loring J Berggren
- 👤 Charles T Hathaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/94; B29C48/001; B29C48/0022; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C2793/00; B29C2793/0063; B29C48/0018; B29C48/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD FOR INTRODUCING BIAXIAL ORIENTATION INTO A TUBULARLY-SHAPED MEMBER OF THERMOPLASTIC SYNTHETIC POLYMERIC MATERIAL COMPRISING THE STEPS OF (1) EXTRUDING A TUBULAR MEMBER OF THERMOPLASTIC SYNTHETIC POLYMERIC MATERIAL, (2) LUBRICATING THE INTERNAL SURFACE OF SAID TUBULAR MEMBER WITH A LIQUID LUBRICANT AT A TEMPERATURE OF 210*-290*F., (3) LATERALLY AND LINGITUDINALLY EXPANDING SAID TUBULAR MEMBER BY DRAWING SAID TUBULAR MEMBER OVER AND IN CONTACT WITH A DIVERGING MANDREL WHILE MAINTAINING THE TEMPERATURE OF SAID TUBULAR MEMBER ABOVE ITS GLASSY TRANSITION TEMPERATURE AND (4) COOLING SAID TUBULAR MEMBER BELOW ITS GLASSY TRANSITION TEMPERATURE.
Claim 2
Independent Claim
92 words
A METHOD FOR INTRODUCING BIAXIAL ORIENTATION INTO A TUBULARLY-SHAPED MEMBER OF THERMOPLASTIC SYNTHETIC POLYMERIC MATERIAL COMPRISING THE STEPS OF (1) EXTRUDING A TUBULAR MEMBER OF THERMOPLASTIC SYNTHETIC POLYMERIC MATERIAL, (2) LUBRICATING THE INTERNAL SURFACE OF SAID TUBULAR MEMBER WITH A LIQUID LUBRICANT AT A TEMPERATURE OF 210*-290*F., (3) LATERALLY AND LINGITUDINALLY EXPANDING SAID TUBULAR MEMBER BY DRAWING SAID TUBULAR MEMBER OVER AND IN CONTACT WITH A DIVERGING MANDREL WHILE MAINTAINING THE TEMPERATURE OF SAID TUBULAR MEMBER ABOVE ITS GLASSY TRANSITION TEMPERATURE AND (4) COOLING SAID TUBULAR MEMBER BELOW ITS GLASSY TRANSITION TEMPERATURE.
References Cited (Backward Citations)
US3090991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |