Patent US2957790A successfully refreshed from Google Patents.
US2957790A
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Method of making cold worked and aged products which are substantially free of objectionable lamellar constituent from precipitation hardenable ferrous base alloys
Assignee: Universal Cyclops Steel Corp
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Filing: 1960-03-16
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Granted: 1960-10-25
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Expires: 1980-03-16
Abstract
No abstract record available.
Inventors
- 👤 Metcalfe Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:02
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/50; C22C38/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE METHOD OF MAKING COLD WORKED AND AGED PRODUCTS WHICH ARE SUBSTANTIALLY FREE OF OBJECTIONABLE LAMELLAR CONSTITUENT FROM PRECIPITATION HARDENABLE FERROUS BASE ALLOYS CONSISTING ESSENTIALLY OF 24 TO 28% NICKEL, 12 TO 16% CHROMIUM, 1.35 TO 4.5% TITANIUM, UP TO 0.15% BORON, UP TO 0.20% CARBON, UP TO 2.0% ALUMINUM, UP TO 3.0% MANGANESE, UP TO 2.0% SILICON, UP TO 5.0% MOLYBDENUM, UP TO 1.0% VANADIUM, UP TO 0.5% ZIRCONIUM AND UP TO 2.0% COLUMBIUM PLUS TANTALUM, THE BALANCE BEING IRON, WHICH COMPRISES SOLUTION HEAT TREATING SAID ALLOY AT A TEMPERATURE OF 1650-1800*F., QUENCHING IT, COLD WORKING IT, SOLUTION HEAT TREATING IT AT A TEMPERATURE OF 19502200*F., QUENCHING IT, AND AGING IT AT A TEMPERATURE OF 1300-1400*F.
Claim 2
Independent Claim
117 words
THE METHOD OF MAKING COLD WORKED AND AGED PRODUCTS WHICH ARE SUBSTANTIALLY FREE OF OBJECTIONABLE LAMELLAR CONSTITUENT FROM PRECIPITATION HARDENABLE FERROUS BASE ALLOYS CONSISTING ESSENTIALLY OF 24 TO 28% NICKEL, 12 TO 16% CHROMIUM, 1.35 TO 4.5% TITANIUM, UP TO 0.15% BORON, UP TO 0.20% CARBON, UP TO 2.0% ALUMINUM, UP TO 3.0% MANGANESE, UP TO 2.0% SILICON, UP TO 5.0% MOLYBDENUM, UP TO 1.0% VANADIUM, UP TO 0.5% ZIRCONIUM AND UP TO 2.0% COLUMBIUM PLUS TANTALUM, THE BALANCE BEING IRON, WHICH COMPRISES SOLUTION HEAT TREATING SAID ALLOY AT A TEMPERATURE OF 1650-1800*F., QUENCHING IT, COLD WORKING IT, SOLUTION HEAT TREATING IT AT A TEMPERATURE OF 19502200*F., QUENCHING IT, AND AGING IT AT A TEMPERATURE OF 1300-1400*F.
References Cited (Backward Citations)
US2803539A
Cited
US2820708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |