Patent US3347005A successfully refreshed from Google Patents.
US3347005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed concrete members
Assignee: CF and I Steel Corp
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Filing: 1965-02-09
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Granted: 1967-10-17
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Expires: 1985-02-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard Kent Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:50
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0693; E; E04; E04C; E04C5/00; E04C5/08; D07B2201/00; D07B2201/20; D07B2201/2015; D07B2201/2023; D07B2201/2024; D07B2201/2029; D07B2201/2038; D07B2201/204; D07B2501/00; D07B2501/20; D07B2501/2015; D07B2501/2023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
AN IMPROVED PRESTRESSED CONCRETE MEMBER HAVING AT LEAST ONE TENDON STRAND UNDER TENSION, SAID STRAND HAVING A PLURALITY OF INTERIOR WIRES INCLUDING AN OUTER LAYER OF HELICALLY WOUND WIRES, AND A PERIPHERAL LAYER OF WIRES HELICALLY WOUND IN THE SAME DIRECTION AS THE OUTER LAYER OF WIRES, EACH WIRE OF THE PERIPHERAL LAYER LYING IN A GROOVE BETWEEN ADJACENT WIRES OF THE OUTER LAYER PROVIDING SPACED HELICALLY EXTENDING TROUGH SHAPED SPACES BETWEEN THE PERIPHERAL WIRES IN WHICH EACH OF SAID TROUGHSHAPED SPACES IN FORMED BY THREE WIRES ONLY, THE SIDES OF EACH TROUGH-SHAPED SPACE BEING FORMED BY THE SURFACES OF TWO ADJACENT WIRES OF THE PERIPHERAL LAYER AND THE BOTTOM THEREOF BY THE SURFACE OF A WIRE OF THE OUTER LAYER THEREBY PROVIDING A LONGITUDINALLY SPACE HAVING A COMPARATIVELY WIDE BOTTOM SURFACE AND FORMING A SHALLOW U-SHAPED TROUGH FOR THE RECEPTION OF THE CONCRETE.
Claim 2
Dependent Claim
144 words
AN IMPROVED PRESTRESSED CONCRETE MEMBER HAVING AT LEAST ONE TENDON STRAND UNDER TENSION, SAID STRAND HAVING A PLURALITY OF INTERIOR WIRES INCLUDING AN OUTER LAYER OF HELICALLY WOUND WIRES, AND A PERIPHERAL LAYER OF WIRES HELICALLY WOUND IN THE SAME DIRECTION AS THE OUTER LAYER OF WIRES, EACH WIRE OF THE PERIPHERAL LAYER LYING IN A GROOVE BETWEEN ADJACENT WIRES OF THE OUTER LAYER PROVIDING SPACED HELICALLY EXTENDING TROUGH SHAPED SPACES BETWEEN THE PERIPHERAL WIRES IN WHICH EACH OF SAID TROUGHSHAPED SPACES IN FORMED BY THREE WIRES ONLY, THE SIDES OF EACH TROUGH-SHAPED SPACE BEING FORMED BY THE SURFACES OF TWO ADJACENT WIRES OF THE PERIPHERAL LAYER AND THE BOTTOM THEREOF BY THE SURFACE OF A WIRE OF THE OUTER LAYER THEREBY PROVIDING A LONGITUDINALLY SPACE HAVING A COMPARATIVELY WIDE BOTTOM SURFACE AND FORMING A SHALLOW U-SHAPED TROUGH FOR THE RECEPTION OF THE CONCRETE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |