Patent US2122831A successfully refreshed from Google Patents.
Patent US3597303A successfully refreshed from Google Patents.
US3597303A
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US
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Radial-ply pneumatic tire cover
Assignee: Kuraray Co Ltd
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Filing: 1968-07-22
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Granted: 1971-08-03
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Expires: 1988-07-22
Abstract
Abstract MODULUS OF AT LEAST 150 G./D., AND (II) THE SAID TWISTING BEING PERFORMED TO SUCH A DEGREE THAT THE TWIST CONSTANT OF THE PLY TWIST RANGES 300-1,200, AND THAT OF THE CABLE TWIST IS 25-70% OF THE TWIST CONSTANT OF THE PLY TWIST. IMPROVED RADIAL-PLY PNEUMATIC TIRE COVER HAVING THE BREAKER, CHARACTERIZED: (I) THAT THE SAID CORDS ARE MADE OF YARNS FROM POLYVINYL ALCOHOL CONTAINING NOT MORE THAN 2 MOL PERCENT OF 1,2-GLYCOL LINKAGE AND OF A DEGREE OF POLYMERIZATION OF NOT LESS THAN 1,200, THE CORDS BEING FORMED BY TWISTING THE SAID YARNS WHICH HAVE A TENACITY OF AT LEAST 8 G./D., AN ELONGATION OF 4-10%, AND AN INITIAL
Inventors
- 👤 Hiroshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:21
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/0042; B60C9/18; B60C9/20; Y; Y10; Y10S; Y10S57/00; Y10S57/902; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249933; Y10T428/249934; Y10T428/249935; Y10T428/249939; Y10T428/31504; Y10T428/31826; Y10T428/31833
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |