US2986463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength heat resistant alloy steel
Assignee: Crucible Steel Company of America
•
Filing: 1960-03-29
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Granted: 1961-05-30
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Expires: 1980-03-29
Abstract
No abstract record available.
Inventors
- 👤 Edward J Dulis
- 👤 Kasak August
- 👤 Vijay K Chandhok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:43
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/30; C22C38/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A HEAT-TREATABLE ALLOY STEEL COMPRISING 0.30 TO 0.45% CARBON, 0 TO 1.0% MANGANESE, 6 TO 9% CHROMIUM, 0.5 TO 1.0% VANADIUM, 5 TO 7% MOLYBDENUM, 4.5 TO 8% COBALT, UP TO 0.02% BORON, AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID STEEL BEING CHARACTERIZED BY VERY HIGH TENSILE AND CREEP-REPTURE STRENGTHS AT TEMPERATURE UP TO 1200*F.
Claim 2
Dependent Claim
55 words
A HEAT-TREATABLE ALLOY STEEL COMPRISING 0.30 TO 0.45% CARBON, 0 TO 1.0% MANGANESE, 6 TO 9% CHROMIUM, 0.5 TO 1.0% VANADIUM, 5 TO 7% MOLYBDENUM, 4.5 TO 8% COBALT, UP TO 0.02% BORON, AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID STEEL BEING CHARACTERIZED BY VERY HIGH TENSILE AND CREEP-REPTURE STRENGTHS AT TEMPERATURE UP TO 1200*F.
References Cited (Backward Citations)
US2212228A
Cited
US2848323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |