US3668020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making steel wires
Assignee: BRIDON AMERICAN Corp A CORP OF NEW YORK
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Filing: 1970-11-09
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Granted: 1972-06-06
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Expires: 1990-11-09
Abstract
Abstract THE METHOD OF MAKING A HIGH STRENGTH DUCTILE COLD DRAWN WIRE FROM HOT ROLLED RODS MADE FROM COMMONLY USED STEELS INCLUDING .65 TO 1.00% CARBON, .25 TO 1.20% MANGANESE, .35% MAXIMUM SILICON, .20% MAXIMUM ALUMINUM, .05% MAXIMUM SULPHUR, .012% MAXIMUM NITORGEN, AND .05% MAXIMUM PHOSPHORUS, BUT WITH THE ADDITION OF .03 TO .15% VANADIUM AND .20% MAXIMUM MOLYBDENUM. THE HOT ROLLED ROD IS DRAWN TO FINISHED SIZE USING ONLY ONE PATENTING STEP WITH THE REDUCTION IN AREA BEING AT LEAST APPROXIMATELY 60%.
Inventors
- 👤 Wilbert A Lucht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:41
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/06; C22; C22C; C22C38/00; C22C38/12
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |