US2625473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium modified magnesium treatment of cast iron
Assignee: Meehanite Metal Corp
•
Filing: 1950-09-08
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Granted: 1953-01-13
•
Expires: 1970-09-08
Abstract
No abstract record available.
Inventors
- 👤 Smalley Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:00
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AS AN ARTICLE OF MANUFACTURE, A CASTING WHICH IF UNTREATED WITH MAGNESIUM AND LITHIUM WOULD HAVE RESULTED IN A GRAY IRON CASTING HAVING A COMMON FLAKE GRAPHITE STRUCTURE, SAID CASTING BEING CHARACTERIZED BY A SUBSTANTIALLY NODULAR GRAPHITE MICROSTRUCTURE IN THE PRESENCE OF AT LEAST .01% RETAINED LITHIUM IN CONJUNCTION WITH .04% RETAINED MAGNESIUM.
Claim 2
Dependent Claim
53 words
AS AN ARTICLE OF MANUFACTURE, A CASTING WHICH IF UNTREATED WITH MAGNESIUM AND LITHIUM WOULD HAVE RESULTED IN A GRAY IRON CASTING HAVING A COMMON FLAKE GRAPHITE STRUCTURE, SAID CASTING BEING CHARACTERIZED BY A SUBSTANTIALLY NODULAR GRAPHITE MICROSTRUCTURE IN THE PRESENCE OF AT LEAST .01% RETAINED LITHIUM IN CONJUNCTION WITH .04% RETAINED MAGNESIUM.
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) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |