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US3426113A
Expired / Lapsed
US
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Biaxial after-stretching of thermoplastic tubular film
Assignee: Polymer Processing Research Institute Ltd
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Filing: 1965-12-06
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Granted: 1969-02-04
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Expires: 1985-12-06
Abstract
No abstract record available.
Inventors
- 👤 Masahide Yazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:47
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/28; B29C55/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125616A
Cited
US2433937A
Cited
US2966700A
Cited
US2987765A
Cited
FR1355708A
Cited
US3304352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |