US2734822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making improved gray cast
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:51
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
AS A NEW ARTICLE OF MANUFACTURE, A GRAY CAST IRON CONTAINING ABOUT 0.04% TO ABOUT 0.1% MAGNESIUM EFFECTIVE TO INDUCE THE OCCURENCE OF GRAPHITE INCAST IRON IN A SPHEROIDAL FORM, A DETRIMENTAL AMOUNMT OF AN ELEMENT SUBVERSIVE TO EFFECT OF SAID MAGNESIUM AND ABOUT 0.01% TO ABOUT 0.06% THORIUM TO COUNTERACT THE DETRIMENTAL EFFECT OF SAID SUBVERSIVE ELEMENT AND TO PROVIDE A CAST IRON CONTAINING MORE GRAPHITE IN A SPHEROIDAL FORM THAN IF THORIUM WERE ABSENT.
Claim 2
Dependent Claim
76 words
AS A NEW ARTICLE OF MANUFACTURE, A GRAY CAST IRON CONTAINING ABOUT 0.04% TO ABOUT 0.1% MAGNESIUM EFFECTIVE TO INDUCE THE OCCURENCE OF GRAPHITE INCAST IRON IN A SPHEROIDAL FORM, A DETRIMENTAL AMOUNMT OF AN ELEMENT SUBVERSIVE TO EFFECT OF SAID MAGNESIUM AND ABOUT 0.01% TO ABOUT 0.06% THORIUM TO COUNTERACT THE DETRIMENTAL EFFECT OF SAID SUBVERSIVE ELEMENT AND TO PROVIDE A CAST IRON CONTAINING MORE GRAPHITE IN A SPHEROIDAL FORM THAN IF THORIUM WERE ABSENT.
References Cited (Backward Citations)
US2538263A
Cited
US2542655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |