US3676031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post-tensioning system
Assignee: CONENCO INTERN Ltd
•
Filing: 1970-05-28
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Granted: 1972-07-11
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Expires: 1990-05-28
Abstract
Abstract A POST-TENSIONING ASSEMBLY FOR CONCRET SLABS AND BEAMS IN WHICH AN ANCHORAGE BLOCK FOR A TENDON HAS REINFORCING GUSSETS FACING OUTWARDLY FROM THE CONCRETE SO AS TO IMPOSE COMPRESSING STRESSES THEREIN IN RESPONSE TO TENSION FORCES ON THE TENDON. A PROTECTIVE TUBE IS REMOVABLY SCREW-THREADED INTO AN ANCHORAGE SHEATH AND COVERS THE CABLE AND IS FITTED OVER AN END OF THE TUBE WHICH PROJECTS FROM THE ANCHORAGE TO ELIMINATE FOULING OF THE CONICAL OPENING OF THE ANCHORAGE WITH CONCRETE AND BONDING OF THE CONCRETE TO THE CABLE. THE ANCHORAGE IS SIMPLE AND EASILY FORMED SO THAT A SINGLE ANCHORAGE ACCOMMODATES PLURAL TENDONS.
Inventors
- 👤 Frederick M Stinton
- 👤 William M Slater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:53
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49874
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |