Patent US2708159A successfully refreshed from Google Patents.
US2708159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treated, hardened alloy steel elements
Assignee: Huntington Alloys Corp
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Filing: 1954-02-26
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Granted: 1955-05-10
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Expires: 1974-02-26
Abstract
No abstract record available.
Inventors
- 👤 Francis B Foley
- 👤 Charles C Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:44
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A HARDENED GEAR WHICH IN USE IS SUBJECTED TO WEAR AND HEAVY STATIC AND IMPACT STRESSES, SAID ELEMENT BEING COMPRISED OF A HEAT TREATED STEEL CONTAINING ABOUT 3.5% TO 6% NICKEL, ABOUT 1.5% TO 2,5% ALUMINUM, ABOUT 0.4% TO 1.25% CHROMIUM, VANADIUM, UP TO ABOUT 1% DENUM, ABOUT 0.05 TO 0.15% VANADIUM, UP TO ABOUT 1% SILICON, UP TO 1% MANGANESE, AND ABOUT 0.18% TO 0.3% CARBON, THE CARBON CONTENT BEING CORRELATED TO THE NICKEL AND ALUMINUM CONTENTS IN THE ALLOY EXPRESSED STOICHIOMETRICALLY BY THE FORMULA NIAL, SUCH THAT WHEN THE NIAL CONTENT OF THE STEEL IS WITHIN THE RANGE OF ABOUT 4.5% TO ABOUT 5.5%, THE CARBON CONTENT IS WITHIN THE RANGE OF 0.25% TO 0.30% AND WHEN THE NIAL IS WITHIN THE RANGE OF ABOUT 5.5% TO 7.5%, THE CARBON CONTENT IS WITHIN THE RANGE OF ABOUT 0.18% TO 0.25%, THE BALANCE OF SAID STEEL BEING ESSENTIALLY IRON.
Claim 2
Dependent Claim
150 words
A HARDENED GEAR WHICH IN USE IS SUBJECTED TO WEAR AND HEAVY STATIC AND IMPACT STRESSES, SAID ELEMENT BEING COMPRISED OF A HEAT TREATED STEEL CONTAINING ABOUT 3.5% TO 6% NICKEL, ABOUT 1.5% TO 2,5% ALUMINUM, ABOUT 0.4% TO 1.25% CHROMIUM, VANADIUM, UP TO ABOUT 1% DENUM, ABOUT 0.05 TO 0.15% VANADIUM, UP TO ABOUT 1% SILICON, UP TO 1% MANGANESE, AND ABOUT 0.18% TO 0.3% CARBON, THE CARBON CONTENT BEING CORRELATED TO THE NICKEL AND ALUMINUM CONTENTS IN THE ALLOY EXPRESSED STOICHIOMETRICALLY BY THE FORMULA NIAL, SUCH THAT WHEN THE NIAL CONTENT OF THE STEEL IS WITHIN THE RANGE OF ABOUT 4.5% TO ABOUT 5.5%, THE CARBON CONTENT IS WITHIN THE RANGE OF 0.25% TO 0.30% AND WHEN THE NIAL IS WITHIN THE RANGE OF ABOUT 5.5% TO 7.5%, THE CARBON CONTENT IS WITHIN THE RANGE OF ABOUT 0.18% TO 0.25%, THE BALANCE OF SAID STEEL BEING ESSENTIALLY IRON.
References Cited (Backward Citations)
US2043631A
Cited
US1896888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |