Patent US3740246A successfully refreshed from Google Patents.
US3740246A
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US
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Process for improving polyamide films
Assignee: Unitika Ltd
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Filing: 1971-01-11
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Granted: 1973-06-19
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Expires: 1991-01-11
Abstract
Abstract THE PRESENT INVENTION RELATES TO IMPROVED POLYAMIDE FILMS FORMED BY THE PROCESS UTILIZING A CONCURRENT BIAXIAL DRAWING TECHNIQUE, FOLLOWED BY HEAT-SETTING OF THE DRAWN FILM WITH SIMULTANEOUS CURING OF A RESIN COMPOSITION APPLIED TO THE FILM SURFACE WHICH IS OF A HEAT-SETTING AND HYDROPHOBIC NATURE.
Inventors
- 👤 M Kuga
- 👤 A Yoshioka
- 👤 T Iwasaki
- 👤 K Kyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:31
CPC Classifications
B; B32; B32B; B32B27/00; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/048; C08J2377/00
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |