US3151978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat hardenable chromium-nickel-aluminum steel
Assignee: Armco Inc
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Filing: 1960-12-30
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Granted: 1964-10-06
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Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 Perry D Cameron
- 👤 Tanczyn Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:08
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A CHROMIUM-NICKEL-ALUMINUM STEEL WHICH IS SUBSTANTIALLY FULLY AUSTENITRIC AT ANNEALING TEMPERATURES AND WHICH IS HARDENABLE BY HEAT-TREATMENT, SAID STEEL CONSISTING ESSENTIALLY OF ABOUT: 4% TO 14.5% CHROMIUM, 6% TO 12% NICKEL, .5% TO 2% ALUMINUM, 4% TO 14% MOLYBDENUM, MANGANESE UP TO 2%, SILICON UP TO 1%, CARBON UP TO .20%, UP TO ABOUT 0.10% OF THE GROUP CONSISTING OF TITANIUM AND ZIRCONIUM, UP TO ABOUT 0.50% COLUMBIUM, BORON UP TO 0.010%, AND REMAINDER SUBSTANTIALLY ALL IRON, WITH ADDITIONAL MANGANESE, IN EXCESS OF SAID 2%, PARTIALLY SUBSTITUTED FOR SAID NICKEL ON THE BASIS OF 2 FOR 1, THE ACTUAL NICKEL CONTENT AMOUNTING TO AT LEAST 3.5%, AND THE TOTAL MANGANESE CONTENT UP TO 19%, ADDITIONAL SILICON SUBSTITUTED FOR CHRONIUM ON THE BASIS OF 1 FOR 1 UP TO A TOTAL SILICON CONTENT OF 3%, TUNGSTEN SUBSTITUTED FOR MOLYBDENUM O NA 1 FOR 1 BASIS UP TO A TOTAL TUNGSTEN CONTENT OF 6%, AND VANADIUM SUBSTITUTED FOR MOLYBDENUM AND TUNGSTEN ON A 1 FOR 1 BASIS UP TO A TOTAL OF VANADIUM CONTENT OF 2%.
Claim 2
Dependent Claim
174 words
A CHROMIUM-NICKEL-ALUMINUM STEEL WHICH IS SUBSTANTIALLY FULLY AUSTENITRIC AT ANNEALING TEMPERATURES AND WHICH IS HARDENABLE BY HEAT-TREATMENT, SAID STEEL CONSISTING ESSENTIALLY OF ABOUT: 4% TO 14.5% CHROMIUM, 6% TO 12% NICKEL, .5% TO 2% ALUMINUM, 4% TO 14% MOLYBDENUM, MANGANESE UP TO 2%, SILICON UP TO 1%, CARBON UP TO .20%, UP TO ABOUT 0.10% OF THE GROUP CONSISTING OF TITANIUM AND ZIRCONIUM, UP TO ABOUT 0.50% COLUMBIUM, BORON UP TO 0.010%, AND REMAINDER SUBSTANTIALLY ALL IRON, WITH ADDITIONAL MANGANESE, IN EXCESS OF SAID 2%, PARTIALLY SUBSTITUTED FOR SAID NICKEL ON THE BASIS OF 2 FOR 1, THE ACTUAL NICKEL CONTENT AMOUNTING TO AT LEAST 3.5%, AND THE TOTAL MANGANESE CONTENT UP TO 19%, ADDITIONAL SILICON SUBSTITUTED FOR CHRONIUM ON THE BASIS OF 1 FOR 1 UP TO A TOTAL SILICON CONTENT OF 3%, TUNGSTEN SUBSTITUTED FOR MOLYBDENUM O NA 1 FOR 1 BASIS UP TO A TOTAL TUNGSTEN CONTENT OF 6%, AND VANADIUM SUBSTITUTED FOR MOLYBDENUM AND TUNGSTEN ON A 1 FOR 1 BASIS UP TO A TOTAL OF VANADIUM CONTENT OF 2%.
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) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |