US3676108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low carbon high yield strength alloy steel
Assignee: National Steel Corp
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Filing: 1970-06-01
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Granted: 1972-07-11
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Expires: 1990-06-01
Abstract
Abstract A LOW CARBON, LOW ALLOY STEEL COMPOSITION WHICH AFTER BEING HEAT TREATED IS CHARACTERIZED BY HIGH YIELD STRENGTH AND DUCTILITY SUITABLE FOR COLD FORMING OPERATIONS CONSISTING ESSENTIALLY BY WEIGHT OF: CARBON: ABOUT 0.05-0.25% MANGANESE: ABOUT 0.50-1.30% SILICON: ABOUT 0.40-0.90% ZIRCONIUM: ABOUT 0.03-0.15% BORON: ABOUT 0.0005-0.0025% WITH THE BALANCE IRON AND RESIDUAL IMPURITIES. THE HEAT TREATED STEEL COMPOSITIONS CAN BE COLD FORMED TO PRODUCE FOR EXAMPLE TRUCK FRAME RAILS.
Inventors
- 👤 William F Mcgarrity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:44
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/002; C22C38/14
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) | 1975-07-11 | 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 |