Patent US1936268A successfully refreshed from Google Patents.
Patent US2778079A successfully refreshed from Google Patents.
US2778079A
Expired / Lapsed
US
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Method of controlling the formation of crystals in molten metal as it solidifies
Assignee: United States Steel Corp
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Filing: 1952-05-21
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Granted: 1957-01-22
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Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Dennis J Carney
- 👤 Bernard R Queneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:51
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
IN A METHOD OF REFINING THE GRAIN OF FERRITIC STEEL A CAST, THE STEPS INCLUDING ADDING TO THE STEEL WHILE MOLTEN, BUT NOT SUBSTANTIALLY EARLIER THAN THE TEEMING THEREOF INTO A MOLD, FROM ONE OUNCE TO FOUR POUNDS PER TON OF A METAL SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
49 words
IN A METHOD OF REFINING THE GRAIN OF FERRITIC STEEL A CAST, THE STEPS INCLUDING ADDING TO THE STEEL WHILE MOLTEN, BUT NOT SUBSTANTIALLY EARLIER THAN THE TEEMING THEREOF INTO A MOLD, FROM ONE OUNCE TO FOUR POUNDS PER TON OF A METAL SELECTED FROM THE GROUP CONSISTING OF
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |