US3196052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressing wire and method of manufacturing the same
Assignee: Somerset Wire Co Ltd
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Filing: 1961-06-28
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Granted: 1965-07-20
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Expires: 1981-06-28
Abstract
No abstract record available.
Inventors
- 👤 Hann Kenneth Graeme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:35
CPC Classifications
B; B21; B21F; B21F99/00; B21C; B21C9/00; B21D; B21D3/00; C; C21; C21D; C21D8/00; C21D8/06; C21D8/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A METHOD OF INCREASING THE RESISTANCE TO CREEP UNDER TENSION OF WIRE FOR USE IN REINFORCED CONCRETE CONSTRUCTION, SAID METHOD COMPRISING SUBJECTING PLAIN CARBON STEEL WIRE HAVING A CARBON CONTENT WITHIN THE RANGE OF .35% TO .9% TO A COLD DRAWING OPERATION BY ADVANCING THE SAME THROUGH DRAWING MEANS, APPLYING TENSION TO THE DRAWN WIRE TO EFFECT ITS ADVANCEMENT THROUGH THE DRAWING MEANS, HEATING THE WIRE AFTER ITS EMERGENCE FROM THE DRAWING MEANS AND WHILE SUBJECTED TO SAID DRAWING TENSION TO A TEMPERING TEMPERATURE WITHIN THE RANGE OF 220* TO 500* C. AND MAINTAINING THE DRAWING TENSION AT SUCH VALUE AS HAVING REGARD TO THE TIME DURING WHICH EACH WIRE LENGTH IS MAINTAINED AT THE TEMPERING TEMPERATURE AND THE VALUE THEREOF AS TO IMPART A PERMANENT ELONGATION TO THE WIRE OF NOT MORE THAN ABOUT 5% AND INCREASE THE CREEP RESISTANCE THEREOF WITHOUT AT THE SAME TIME APPLYING A TENSILE FORCE SUFFICIENTLY GREAT TO THE WIRE AS TO EFFECT FAILURE OF THE WIRE UNDER THE APPLIED TENSILE LOAD.
Claim 2
Independent Claim
168 words
A METHOD OF INCREASING THE RESISTANCE TO CREEP UNDER TENSION OF WIRE FOR USE IN REINFORCED CONCRETE CONSTRUCTION, SAID METHOD COMPRISING SUBJECTING PLAIN CARBON STEEL WIRE HAVING A CARBON CONTENT WITHIN THE RANGE OF .35% TO .9% TO A COLD DRAWING OPERATION BY ADVANCING THE SAME THROUGH DRAWING MEANS, APPLYING TENSION TO THE DRAWN WIRE TO EFFECT ITS ADVANCEMENT THROUGH THE DRAWING MEANS, HEATING THE WIRE AFTER ITS EMERGENCE FROM THE DRAWING MEANS AND WHILE SUBJECTED TO SAID DRAWING TENSION TO A TEMPERING TEMPERATURE WITHIN THE RANGE OF 220* TO 500* C. AND MAINTAINING THE DRAWING TENSION AT SUCH VALUE AS HAVING REGARD TO THE TIME DURING WHICH EACH WIRE LENGTH IS MAINTAINED AT THE TEMPERING TEMPERATURE AND THE VALUE THEREOF AS TO IMPART A PERMANENT ELONGATION TO THE WIRE OF NOT MORE THAN ABOUT 5% AND INCREASE THE CREEP RESISTANCE THEREOF WITHOUT AT THE SAME TIME APPLYING A TENSILE FORCE SUFFICIENTLY GREAT TO THE WIRE AS TO EFFECT FAILURE OF THE WIRE UNDER THE APPLIED TENSILE LOAD.
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |