US2536033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature stainless steel
Assignee: Armco Inc
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Filing: 1948-05-14
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Granted: 1951-01-02
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Expires: 1968-05-14
Abstract
No abstract record available.
Inventors
- 👤 Jr William Charles Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:49
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
AUSTENITIC CHROMIUM-NICKEL-COBALT STAINLESS STEEL HAVING GOOD HOT-WORKING PROPERTIES AND GOOD LIFE AND STRENGTH AT HIGH TEMPERATURES, CONTAINING ABOUT 0.03% TO 0.20% CARBON, 12% TO 22% CHROMIUM, 10% TO 22% NICKEL, FROM 5% TO 20% COBALT, NOT MORE THAN ABOUT 2% MANGANESE, 2% TO 4% MOLYBDENUM, 2% TO 4% COPPER, AT LEAST ONE METAL OF THE GROUP CONSISTING OF TITANIUM AND COLUMBIUM, THE TITANIUM RANGING FROM 0.15% TO 0.75% IN AMOUNT, AND THE COLUMBIUM FROM 0.20% TO 1.10%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
83 words
AUSTENITIC CHROMIUM-NICKEL-COBALT STAINLESS STEEL HAVING GOOD HOT-WORKING PROPERTIES AND GOOD LIFE AND STRENGTH AT HIGH TEMPERATURES, CONTAINING ABOUT 0.03% TO 0.20% CARBON, 12% TO 22% CHROMIUM, 10% TO 22% NICKEL, FROM 5% TO 20% COBALT, NOT MORE THAN ABOUT 2% MANGANESE, 2% TO 4% MOLYBDENUM, 2% TO 4% COPPER, AT LEAST ONE METAL OF THE GROUP CONSISTING OF TITANIUM AND COLUMBIUM, THE TITANIUM RANGING FROM 0.15% TO 0.75% IN AMOUNT, AND THE COLUMBIUM FROM 0.20% TO 1.10%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |