US3576934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of polymeric materials
Assignee: Honeywell International Inc
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Filing: 1968-12-26
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Granted: 1971-04-27
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Expires: 1988-12-26
Abstract
Abstract BIAXIALLY ORIENTED TUBULAR FILMS, HAVING A UNIFORM THICKNESS AND ORIENTATION, ARE PREPARED BY A NOVEL PROCESS WHEREIN TWO PAIRS OF DRIVEN DRAW NIP ROLLERS, POSITIONED AT RIGHT ANGLES AND IN DIFFERENT PLANES WITH RESPECT TO EACH OTHER, ARE USED TO EFFECT A LONGITUDINAL STRETCH, WHILE SIMULTANEOUSLY EXPANDING THE FILM DIAMETER TO EFFECT A TRANSVERSE ORIENTATION AND ADDITIONAL LONGITUDNAL ORIENTATION.
Inventors
- 👤 Giordano Vaghi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:03
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/001; B29C48/0018; B29C48/0019; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |