US2641540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrous base chromium-nickel-titanium alloy
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1951-07-19
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Granted: 1953-06-09
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Expires: 1971-07-19
Abstract
No abstract record available.
Inventors
- 👤 Mohling Gunther
- 👤 Wasil W Dyrkacz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:51
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A COMMERCIALLY PRODUCIBLE AND FORGEABLE AUSTENITIC ALLOY STEEL SUITABLE FOR MOVING PART USAGE AND HAVING AN INHERENTLY GOOD RUPTURE DUCTILITY WITH A HIGH NOTCH RUPTURE STRENGTH AT ELEVATED TEMPERATURES OF ABOUT 1000 TO 1300* F., IN WHICH MANGANESE, CHROMIUM, NICKEL, TITANIUM, MOLYBEDENUM AND VANADIUM ARE THE ONLY ESSENTIAL ELEMENTS, ARE CRITICAL WITHIN THE RANGES SPECIFIED, AND THE SPECIFIED CONTENTS OF THE ELEMENTS MANGANESE AND VANADIUM ARE ESSENTIALLY IN SOLID SOLUTION FORM IN THE ALLOY, AND IN WHICH ALUMINUM MAY BE PRESENT IN INCIDENTAL AMOUNTS AND UP TO ABOUT 2.50% WITH THE PRESENCE OF COBALT OF UP TO ABOUT 25%; THE COMPOSITION CONSISTING OF CARBON IN A RELATIVELY SMALL AMOUNT UP TO A MAXIMUM OF ABOUT .15%, ABOUT .50 TO 3.00% MANGANESE, UP TO ABOUT 1.50% SILICON, ABOUT 5 TO 22% CHROMIUM, ABOUT 7 TO 50% NICKEL, ABOUT .50 TO 3.50% TITANIUM, ABOUT .25 TO 2.00% MOLYBDENUM, ABOUT .10 TO 1.50% VANADIUM, AND THE RAMAINDER IRON WITH INCIDENTAL IMPURITIES.
Claim 2
Dependent Claim
158 words
A COMMERCIALLY PRODUCIBLE AND FORGEABLE AUSTENITIC ALLOY STEEL SUITABLE FOR MOVING PART USAGE AND HAVING AN INHERENTLY GOOD RUPTURE DUCTILITY WITH A HIGH NOTCH RUPTURE STRENGTH AT ELEVATED TEMPERATURES OF ABOUT 1000 TO 1300* F., IN WHICH MANGANESE, CHROMIUM, NICKEL, TITANIUM, MOLYBEDENUM AND VANADIUM ARE THE ONLY ESSENTIAL ELEMENTS, ARE CRITICAL WITHIN THE RANGES SPECIFIED, AND THE SPECIFIED CONTENTS OF THE ELEMENTS MANGANESE AND VANADIUM ARE ESSENTIALLY IN SOLID SOLUTION FORM IN THE ALLOY, AND IN WHICH ALUMINUM MAY BE PRESENT IN INCIDENTAL AMOUNTS AND UP TO ABOUT 2.50% WITH THE PRESENCE OF COBALT OF UP TO ABOUT 25%; THE COMPOSITION CONSISTING OF CARBON IN A RELATIVELY SMALL AMOUNT UP TO A MAXIMUM OF ABOUT .15%, ABOUT .50 TO 3.00% MANGANESE, UP TO ABOUT 1.50% SILICON, ABOUT 5 TO 22% CHROMIUM, ABOUT 7 TO 50% NICKEL, ABOUT .50 TO 3.50% TITANIUM, ABOUT .25 TO 2.00% MOLYBDENUM, ABOUT .10 TO 1.50% VANADIUM, AND THE RAMAINDER IRON WITH INCIDENTAL IMPURITIES.
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |