US3745151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly-xi-caprolactam filament useful for tire cord
Assignee: Toray Industries Inc
•
Filing: 1971-02-08
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Granted: 1973-07-10
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Expires: 1991-02-08
Abstract
Abstract POLY-E-CAPROLACTAM FILAMENT USEFUL FOR TIRE CORD HAVING A HIGH TENACITY AND UNIFORMITY IS PRODUCED BY A METHOD IN WHICH A FILAMENT SPUN FROM A POLY-E-CAPROLACTAM HAVING A RELATIVE VISCOSITY HIGHER THAN 2.9 IS IMMEDIATELY DRAWN IN AT LEAST TWO SUCCESSIVE STAGES WHEREIN THE SPUN FILAMENT IS DRAWN IN AT LEAST ONE EARLIER STAGE INTO A PRIMARY DRAWN FILAMENT HAVING NO MEASURABLE BIREFRINGENCE AND THEN THE PRIMARY DRAWN FILAMENT IS FURTHER DRAWN TO PROVIDE A SELECTED TOTAL DRAW RATIO. THE DRAWN FILAMENT IN AT LEAST ONE DRAWING STAGE HAS A Y-FORM CRYSTALLINE STRUCTURE CONTENT CY DEFINED BY 0.65$CY$0.90.
Inventors
- 👤 H Takeda
- 👤 M Tanimura
- 👤 E Oda
- 👤 R Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:04
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; Y; Y10; Y10S; Y10S57/00; Y10S57/902
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |