Patent FR1183358A successfully refreshed from Google Patents.
US3794547A
Expired / Lapsed
US
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Polyamide films
Assignee: Unitika Ltd
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Filing: 1971-12-06
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Granted: 1974-02-26
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Expires: 1991-12-06
Abstract
Abstract THIS INVENTION RELATES TO VERY THIN POLYAMIDE FILMS HAVING HIGH PURITY AND TRANSPARENCY, HIGH TENSILE STRENGTH, AND OTHER IMPROVED PROPERTIES.
Inventors
- 👤 M Kuga
- 👤 T Mashimo
- 👤 M Tsuruta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/16; B29D; B29D7/00; B29D7/01; B29C71/00; B29K; B29K2077/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |