US2542655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gray cast iron
Assignee: Huntington Alloys Corp
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Filing: 1949-09-17
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Granted: 1951-02-20
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Expires: 1969-09-17
Abstract
No abstract record available.
Inventors
- 👤 Gagnebin Albert Paul
- 👤 Spear Warren Mclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:21
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
THE IMPROVED PROCESS FOR PRODUCING HYPOEUTECTIC GRAY CAST IRON CONTAINING SPHEROIDAL GRAPITE WHICH COMPRISES ESTABLISHING AN IRON BATH HAVING SUCH A COMPOSITION ESTABLISHING AN IRON EUTECTIC GRAY CAST IRON WHEN INOCULATED AND CAST, INCORPORATING IN SAID BATH SUFFICIENT MAGNESIUM TO PROVIDE A RETAINED MAGNESIUM CONTENT OF AT LEAST ABOUT 0.015% BUT LESS THAN ABOUT 0.04% AND INSUFFICIENT BY ITSELF TO CONTROL THE OCCURRENCE OF SUBSTANTIALLY SPHEROIDOL GRAPHIC IN CASTINGS MADE FROM SAID BATH AND SUFFICIENT CERTIUM TO PROVIDE A RETAINED CERIUM CONTENT OF AT LEAST ABOUT 0.015% IN CASTING MADE FROM SAID BATH, INOCULTING SAID BATH WITH ABOUT 0.3% TO ABOUT 2.5% SILICON AND CASTING THE METAL FROM THE INOCULATED BATH IN AN INOCULATED CONDITION TO OBTAIN A HYPOEUTECTIC GRAY IRON CASTING CONTAINING ABOUT 0.005% TO ABOUT 0.075% MAGNESIUM PLUS CERIUM AND CONTAINING GRAPHIC IN A SUBSTANTIALLY SPHEROIDAL FORM.
Claim 2
Dependent Claim
139 words
THE IMPROVED PROCESS FOR PRODUCING HYPOEUTECTIC GRAY CAST IRON CONTAINING SPHEROIDAL GRAPITE WHICH COMPRISES ESTABLISHING AN IRON BATH HAVING SUCH A COMPOSITION ESTABLISHING AN IRON EUTECTIC GRAY CAST IRON WHEN INOCULATED AND CAST, INCORPORATING IN SAID BATH SUFFICIENT MAGNESIUM TO PROVIDE A RETAINED MAGNESIUM CONTENT OF AT LEAST ABOUT 0.015% BUT LESS THAN ABOUT 0.04% AND INSUFFICIENT BY ITSELF TO CONTROL THE OCCURRENCE OF SUBSTANTIALLY SPHEROIDOL GRAPHIC IN CASTINGS MADE FROM SAID BATH AND SUFFICIENT CERTIUM TO PROVIDE A RETAINED CERIUM CONTENT OF AT LEAST ABOUT 0.015% IN CASTING MADE FROM SAID BATH, INOCULTING SAID BATH WITH ABOUT 0.3% TO ABOUT 2.5% SILICON AND CASTING THE METAL FROM THE INOCULATED BATH IN AN INOCULATED CONDITION TO OBTAIN A HYPOEUTECTIC GRAY IRON CASTING CONTAINING ABOUT 0.005% TO ABOUT 0.075% MAGNESIUM PLUS CERIUM AND CONTAINING GRAPHIC IN A SUBSTANTIALLY SPHEROIDAL FORM.
Claim 3
Dependent Claim
143 words
AN IRON CASTING CONTAINING ABOUT 2.5% TO ABOUT 3.7% CARBON, WITH THE EXCESS CARBON NOT REQUIRED TO FORM THE MATRIX BEING PREDOMINANTLY UNCOMBINED, ABOUT 1.5% TO ABOUT 3% SILICON, UP TO ABOUT 0.5% PHOSPHORUS, THE CARBON, SILCON AND PHOSPHORUS CONTENTS BEING SO RELATED THAT THE SUM OF THE CARBON CONTENT PLUS ONE-THIRD THE SILICON CONTENT PLUS ONE-THIRD THE PHOSPHORUS CONTENT IS LESS THAN 4.3, MAGNESIUM FROM ABOUT 0.015% TO ABOUT 0.035% AND UNSIFFICIENT BY ITSELF TO CONTROL THE OCCURRENCE OF A SUBSTANTIAL AMOUNT OF GRAPHIC IN A SPHEROIDAL FORM, AT LEAST ABOUT 0.015% CERIUM, WITH THE MAGNESIUM PLUS CERIUM CONTENT BEING ABOUT 0.05% TO ABOUT 0.75% TO CONTROL THE OCCURRENCE OF A SUBSTANTIAL AMOUNT OF THE UNCOMBINED CARBON IN A SUBSTANTIALLY SPHEROIDAL FORM, AND THE BALANCE ESSENTIALLY IRON TO PROVIDE A FERROUS MATRIX IN WHICH THE SUBSTANTIALLY SPHEROIDAL UNCOMBINED CARBON PARTICLES ARE DISPERSED.
Claim 4
Dependent Claim
143 words
AN IRON CASTING CONTAINING ABOUT 2.5% TO ABOUT 3.7% CARBON, WITH THE EXCESS CARBON NOT REQUIRED TO FORM THE MATRIX BEING PREDOMINANTLY UNCOMBINED, ABOUT 1.5% TO ABOUT 3% SILICON, UP TO ABOUT 0.5% PHOSPHORUS, THE CARBON, SILCON AND PHOSPHORUS CONTENTS BEING SO RELATED THAT THE SUM OF THE CARBON CONTENT PLUS ONE-THIRD THE SILICON CONTENT PLUS ONE-THIRD THE PHOSPHORUS CONTENT IS LESS THAN 4.3, MAGNESIUM FROM ABOUT 0.015% TO ABOUT 0.035% AND UNSIFFICIENT BY ITSELF TO CONTROL THE OCCURRENCE OF A SUBSTANTIAL AMOUNT OF GRAPHIC IN A SPHEROIDAL FORM, AT LEAST ABOUT 0.015% CERIUM, WITH THE MAGNESIUM PLUS CERIUM CONTENT BEING ABOUT 0.05% TO ABOUT 0.75% TO CONTROL THE OCCURRENCE OF A SUBSTANTIAL AMOUNT OF THE UNCOMBINED CARBON IN A SUBSTANTIALLY SPHEROIDAL FORM, AND THE BALANCE ESSENTIALLY IRON TO PROVIDE A FERROUS MATRIX IN WHICH THE SUBSTANTIALLY SPHEROIDAL UNCOMBINED CARBON PARTICLES ARE DISPERSED.
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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |