Patent US2861908A successfully refreshed from Google Patents.
US2861908A
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Alloy steel and method of making
Assignee: American Steel Foundries
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Filing: 1955-11-30
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Granted: 1958-11-25
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Expires: 1975-11-30
Abstract
No abstract record available.
Inventors
- 👤 Cedric G Mickelson
- 👤 Ellen S Lillieqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:56
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/32; C22C38/40; C22C38/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A STEEL ALLOY CASTING COMPOSED OF: ABOUT 20 TO .50%C, ABOUT .15 TO 2.5% MN, ABOUT .1 TO 2.00% SI, NIL TO ABOUT .025% P, NIL TO ABOUT .025% S, ABOUT .50 TO 1.50% CR, ABOUT .05 TO .70% MO, RESIDUAL TO 1.00% NI, ABOUT .0005 TO .005% B, ABOUT 0.0015 TO 0.5% RARE EARTH METALS, THE BALANCE-IRON, SAID CASTING HAVING AN INTERNAL STRUCTURE PRODUCED BY NORMALIZING AT 1600 TO 1900*F. FOLLOWED BY AIR COOLING, THEN HEATING TO ABOUT 1500 TO 1650*F. FOLLOWED BY A QUENCH, THEN HEATING TO ABOUT 200 TO LESS THAN 600*F. FOLLOWED BY ANOTHER QUENCH, AND SAID CASTING BEING CHARACTERIZED BY THE PROPERTIES OF A BRINELL HARDNESS VALUE OF AT LEAST 444, AND A CHARPY IMPACT VALUE OF AT LEAST 12 FOOT POUNDS AT -40*F.
Claim 2
Dependent Claim
129 words
A STEEL ALLOY CASTING COMPOSED OF: ABOUT 20 TO .50%C, ABOUT .15 TO 2.5% MN, ABOUT .1 TO 2.00% SI, NIL TO ABOUT .025% P, NIL TO ABOUT .025% S, ABOUT .50 TO 1.50% CR, ABOUT .05 TO .70% MO, RESIDUAL TO 1.00% NI, ABOUT .0005 TO .005% B, ABOUT 0.0015 TO 0.5% RARE EARTH METALS, THE BALANCE-IRON, SAID CASTING HAVING AN INTERNAL STRUCTURE PRODUCED BY NORMALIZING AT 1600 TO 1900*F. FOLLOWED BY AIR COOLING, THEN HEATING TO ABOUT 1500 TO 1650*F. FOLLOWED BY A QUENCH, THEN HEATING TO ABOUT 200 TO LESS THAN 600*F. FOLLOWED BY ANOTHER QUENCH, AND SAID CASTING BEING CHARACTERIZED BY THE PROPERTIES OF A BRINELL HARDNESS VALUE OF AT LEAST 444, AND A CHARPY IMPACT VALUE OF AT LEAST 12 FOOT POUNDS AT -40*F.
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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |