US3739055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat treating polyamide fibers
Assignee: Bridgestone Corp
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Filing: 1970-08-19
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Granted: 1973-06-12
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Expires: 1990-08-19
Abstract
Abstract POLYAMIDE FIBERS ARE STABILIZED AGAINST HEAT AND STRESS BY SUBJECTING THE FIBERS TO A HEAT TREATMENT AT A HIGH TEMPERATURE FOR A GIVEN IME UNDER A HIGH TENSION AND THEN TO A HEAT TREATMENT AT A HIGH TEMPERATURE FOR A GIVEN TIME UNDER A LOW TENSION ALTERNATELY REPEATEDLY AT LEAST 3 TIMES. THESE POLYAMIDE FIBERS ARE USED FOR REINFORCING ELASTIC MATERIALS, PARTICULARLY FOR TYRE CORD.
Inventors
- 👤 T Ueda
- 👤 T Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:46
CPC Classifications
D; D01; D01D; D01D10/00; D01D10/02; D01F; D01F6/00; D01F6/58; D01F6/60
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |