US2980529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making aluminum killed steel
Assignee: American Metallurgical Products Co
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Filing: 1956-12-07
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Granted: 1961-04-18
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Expires: 1976-12-07
Abstract
No abstract record available.
Inventors
- 👤 William E Knapp
- 👤 Wilbur T Bolkcom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:23
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF REDUCING ALUMINA SEGREGATION AND IMPARTING HOT AND COLD DUCTILITY TO ALUMINUM KILLED STEEL COMPRISING THE STEPS OF ADDING TO A LADLE AN ALLOY OF ABOUT 4% TO 30% RARE EARTH METALS AND THE BALANCE ALUMINUM WITH USUAL IMPURITIES IN ORDINARY AMOUNTS, POURING INTO THE LADLE A MOLTEN BATH OF STEEL TO BE KILLED AND THEREAFTER TEEMING THE MOLTEN PRODUCT INTO MOLDS.
Claim 2
Independent Claim
64 words
THE METHOD OF REDUCING ALUMINA SEGREGATION AND IMPARTING HOT AND COLD DUCTILITY TO ALUMINUM KILLED STEEL COMPRISING THE STEPS OF ADDING TO A LADLE AN ALLOY OF ABOUT 4% TO 30% RARE EARTH METALS AND THE BALANCE ALUMINUM WITH USUAL IMPURITIES IN ORDINARY AMOUNTS, POURING INTO THE LADLE A MOLTEN BATH OF STEEL TO BE KILLED AND THEREAFTER TEEMING THE MOLTEN PRODUCT INTO MOLDS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |