US4333306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel cord
Assignee: Individual
•
Filing: 1980-12-22
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Granted: 1982-06-08
•
Expires: 2000-12-22
Abstract
Abstract A steel cord composed of a plurality of material wires intertwisted, having loosely intertwisted portions and tightly intertwisted portions alternately at regular intervals so as to facilitate penetration of a rubber compound into the central part thereof throughout its whole length and to ensure stability of twist.
Inventors
- 👤 Fumio Yamashita
- 👤 Hideharu Kurobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:52
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0606; D07B1/062; B; B60; B60C; B60C9/00; B60C9/0007; D07B5/00; D07B5/005; D07B7/00; D07B7/16; D07B7/18; D07B7/187; D07B2201/00; D07B2201/20; D07B2201/2015; D07B2201/2022; D07B2201/2024; D07B2201/2026; Y; Y10; Y10S; Y10S57/00; Y10S57/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A steel cord composed of a plurality of material wires intertwisted, wherein loosely intertwisted portions and tightly intertwisted portions alternate with each other, and wherein a distance between loosely intertwisted portions is made one pitch or two pitches and wherein the ratio of the cord diameter at a loosely intertwisted portion D 1 to the cord diameter at a tightly intertwisted portion D 2 is in the range of from 1.15 to 1.4.
Claim 2
Dependent Claim
73 words
A steel cord composed of a plurality of material wires intertwisted, wherein loosely intertwisted portions and tightly intertwisted portions alternate with each other, and wherein a distance between loosely intertwisted portions is made one pitch or two pitches and wherein the ratio of the cord diameter at a loosely intertwisted portion D 1 to the cord diameter at a tightly intertwisted portion D 2 is in the range of from 1.15 to 1.4.
References Cited (Backward Citations)
US1759410A
Cited
US2961010A
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US2876616A
Cited
US3318082A
Cited
US3911662A
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US4176513A
Cited
US4258543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |