Patent US2587613A successfully refreshed from Google Patents.
US2587613A
Expired / Lapsed
US
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High temperature high strength alloys
Assignee: Crucible Steel Company of America
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Filing: 1948-12-02
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Granted: 1952-03-04
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Expires: 1968-12-02
Abstract
No abstract record available.
Inventors
- 👤 Payson Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:14
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/50; C22C38/44; C22C38/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A FORGEABLE, AUSTENITIC, ALLOY STEEL, CHARACTERIZED IN HAVING A 100-HOUR STRESS-TO-RUPTURE VALUE AT 1500* F. OF AT LEAST 15,000 POUNDS PER SQUARE INCH (P. S. I.), SAID STEEL CONTAINING: ABOUT 20 TO 30% NICKEL AND ABOUT 16 TO 22% CHROMIUM, THE CHROMIUM CONTENT BEING LESS THAN THE NICKEL CONTENT; ABOUT 3 TO 15% EACH OF TUNGSTEN AND MOLYBDENUM, THE COMBINED CONTENT OF THESE TWO ELEMENTS BEING ABOUT 10 TO 20%; CARBON FROM AN EFFECTIVE AMOUNT UP TO ABOUT 0.3%; MANGANESE UP TO ABOUT 2%; SILICON UP TO ABOUT 1%; VANADIUM UP TO ABOUT 3%; TITANIUM UP TO ABOUT 2%; COLUMBIUM UP TO ABOUT 1%; AND THE BALANCE IRON.
Claim 2
Dependent Claim
108 words
A FORGEABLE, AUSTENITIC, ALLOY STEEL, CHARACTERIZED IN HAVING A 100-HOUR STRESS-TO-RUPTURE VALUE AT 1500* F. OF AT LEAST 15,000 POUNDS PER SQUARE INCH (P. S. I.), SAID STEEL CONTAINING: ABOUT 20 TO 30% NICKEL AND ABOUT 16 TO 22% CHROMIUM, THE CHROMIUM CONTENT BEING LESS THAN THE NICKEL CONTENT; ABOUT 3 TO 15% EACH OF TUNGSTEN AND MOLYBDENUM, THE COMBINED CONTENT OF THESE TWO ELEMENTS BEING ABOUT 10 TO 20%; CARBON FROM AN EFFECTIVE AMOUNT UP TO ABOUT 0.3%; MANGANESE UP TO ABOUT 2%; SILICON UP TO ABOUT 1%; VANADIUM UP TO ABOUT 3%; TITANIUM UP TO ABOUT 2%; COLUMBIUM UP TO ABOUT 1%; AND THE BALANCE 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) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |