US3759706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High toughness alloy ateel with improved weldability
Assignee: United States Department of the Navy
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Filing: 1972-02-23
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Granted: 1973-09-18
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Expires: 1992-02-23
Abstract
Abstract AN ALLOY STEEL HAVING 0.2% OFFSET YIELD STRENGHTS GREATER THAN 100K S.I. IN PLATES UP TO 6 INCHES THICK, HIGH TOUGHNESS AT TEMPERATURES DOWN TO -120*F., AND A VERY LOW TENDENCY TOWARD HAZ CRACKING. THE PRINCIPAL CONSTITUENTS OF THE STEEL COME EASILY WITHIN THE COLLOWING RANGES: ELEMENTS PERCENTAGE BY WEIGHT C 0.09-.013 MN 0.60-0.85 P (MAX.) 0.015 S (MAX.) 0.020 SI 0.20-0.35 NI 2.5-4.5 CR 0.40-1.20 MO 0.25-0.60 V 0.05-0.10 AL 0.015-0.035 BALANCE ESSENTIALLY IRON.
Inventors
- 👤 B Mravic
- 👤 L Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:50
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |