US2534190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant steel alloy
Assignee: Calumet Steel Castings Corp
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Filing: 1949-09-10
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Granted: 1950-12-12
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Expires: 1969-09-10
Abstract
No abstract record available.
Inventors
- 👤 Bohumil A Zikmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:55
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A HEAT RESISTANT STEEL ALLOY ADAPTED TO WITHSTAND INTENSE AND CONTINUOUS HEATING AND EXTREME VARIATIONS IN TEMPERATURE, SAID ALLOY COMPRISING ABOUT 0.40% TO 0.50% CARBON, 1.00% TO 1.25% SILICON, 1.00% TO 1.25% MANGANESE, 0.75% TO 1.00% CHROME, 3.00% TO 3.50% NICKEL, AND THE BALANCE SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
47 words
A HEAT RESISTANT STEEL ALLOY ADAPTED TO WITHSTAND INTENSE AND CONTINUOUS HEATING AND EXTREME VARIATIONS IN TEMPERATURE, SAID ALLOY COMPRISING ABOUT 0.40% TO 0.50% CARBON, 1.00% TO 1.25% SILICON, 1.00% TO 1.25% MANGANESE, 0.75% TO 1.00% CHROME, 3.00% TO 3.50% NICKEL, AND THE BALANCE SUBSTANTIALLY ALL IRON.
References Cited (Backward Citations)
AT83074B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |