US2779075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast article and method of making
Assignee: Griffin Wheel Co Inc
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Filing: 1953-03-09
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Granted: 1957-01-29
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Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Edmund Q Sylvester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/22; B22C9/28; Y; Y10; Y10S; Y10S164/00; Y10S164/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A METHOD OF MAKING A STEEL CASTING COMPRISING POURING MOLTEN STEEL HAVING A CARBON CONTENT OF FROM ABOUT .6% TO ABOUT 1.0% INTP A GRAPHITE MOLD HAVING A WEIGHT AT LEAST ABOUT THREE TIMES THAT OF THE STEEL POURED INTO SAID MOLD.
Claim 2
Independent Claim
42 words
A METHOD OF MAKING A STEEL CASTING COMPRISING POURING MOLTEN STEEL HAVING A CARBON CONTENT OF FROM ABOUT .6% TO ABOUT 1.0% INTP A GRAPHITE MOLD HAVING A WEIGHT AT LEAST ABOUT THREE TIMES THAT OF THE STEEL POURED INTO SAID MOLD.
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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |