Patent US2582469A successfully refreshed from Google Patents.
US2582469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgy
Assignee: Individual
•
Filing: 1948-08-11
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Granted: 1952-01-15
•
Expires: 1968-08-11
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:45
CPC Classifications
C; C21; C21C; C21C7/00; C22; C22C; C22C33/00; C22C33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE METHOD OF PRODUCING FERROCHROMIUM WHICH COMPRISES HEATING A CHARGE COMPRISING CHROMITE ORE, A SOLID CARBONACEOUS REDUCING AGENT AND FLUXING MATERIAL TO A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO AT LEAST SINTER THE CHARGE AND PRODUCING A HIGH-TEMPERATURE PRODUCT, ADDING THE HIGH-TEMPERATURE PRODUCT DIRECTLY TO A MOLTEN CHARGE UNDERGOING REDUCTION IN AN OPEN ARC ELECTRIC FURNACE AND REDUCING IRON AND CHROMIUM OF THE CHROMITE ORE WITH THE PRODUCTION OF MOLTEN FERROCHROMIUM, AND WITHDRAWING MOLTEN FERROCHROMIUM FROM THE FURNACE.
Claim 2
Independent Claim
81 words
THE METHOD OF PRODUCING FERROCHROMIUM WHICH COMPRISES HEATING A CHARGE COMPRISING CHROMITE ORE, A SOLID CARBONACEOUS REDUCING AGENT AND FLUXING MATERIAL TO A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO AT LEAST SINTER THE CHARGE AND PRODUCING A HIGH-TEMPERATURE PRODUCT, ADDING THE HIGH-TEMPERATURE PRODUCT DIRECTLY TO A MOLTEN CHARGE UNDERGOING REDUCTION IN AN OPEN ARC ELECTRIC FURNACE AND REDUCING IRON AND CHROMIUM OF THE CHROMITE ORE WITH THE PRODUCTION OF MOLTEN FERROCHROMIUM, AND WITHDRAWING MOLTEN FERROCHROMIUM FROM THE FURNACE.
References Cited (Backward Citations)
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US1717160A
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US2243785A
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US2430671A
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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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |