US2643949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of iron and steel
Assignee: MOLYBDENUM Corp
•
Filing: 1951-07-10
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Granted: 1953-06-30
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Expires: 1971-07-10
Abstract
No abstract record available.
Inventors
- 👤 Norman F Tisdale
- 👤 Jr Norman F Tisdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/04; C21; C21C; C21C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A METHOD FOR THE PRODUCTION OF IRON AND STEEL WHICH COMPRISES PREPARING AN IRO CONTAINING MELT, ADDING METALLICS THERETO DURING FURNACING, DEOXIDIZING, INCORPORATING A COMPOSITION CONTAINING A RARE EARTH OXIDE, THEN POURING AND QUICK FREEZING.
Claim 2
Independent Claim
35 words
A METHOD FOR THE PRODUCTION OF IRON AND STEEL WHICH COMPRISES PREPARING AN IRO CONTAINING MELT, ADDING METALLICS THERETO DURING FURNACING, DEOXIDIZING, INCORPORATING A COMPOSITION CONTAINING A RARE EARTH OXIDE, THEN POURING AND QUICK FREEZING.
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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |