US2840872A
Expired / Lapsed
US
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Method of economically introducing zirconium into steel
Assignee: Sharon Steel Corp
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Filing: 1952-01-14
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Granted: 1958-07-01
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Expires: 1972-01-14
Abstract
No abstract record available.
Inventors
- 👤 Bidner John
- 👤 Phillips M Connor
- 👤 William H Mcclure
- 👤 Parks William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:41
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; C22C1/03; C21; C21C; C21C7/00; C21C7/04; C21C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OF ECONOMICALLY INTRODUCING ZIRCONIUM INTO STEEL INCLUDING THE STEPS OF COLLECTING A HEAT OF FULLY KILLED STEEL IN A LADLE, POURING THE KILLED STEEL INTO AN INGOT MOLD, AND FEEDING A MIXTURE OF ZIRCONIUM-CONTAINING MATERIAL AND ALUMINUM IN THE RATIO OF 10 TO 20 ZIRCONIUM-CONTAINING MATERIAL TO 1 OF ALUMINUM BY WEIGHT TO THE MOLD DURING POURING.
Claim 2
Independent Claim
59 words
THE METHOD OF ECONOMICALLY INTRODUCING ZIRCONIUM INTO STEEL INCLUDING THE STEPS OF COLLECTING A HEAT OF FULLY KILLED STEEL IN A LADLE, POURING THE KILLED STEEL INTO AN INGOT MOLD, AND FEEDING A MIXTURE OF ZIRCONIUM-CONTAINING MATERIAL AND ALUMINUM IN THE RATIO OF 10 TO 20 ZIRCONIUM-CONTAINING MATERIAL TO 1 OF ALUMINUM BY WEIGHT TO THE MOLD DURING POURING.
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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |