Patent US2637648A successfully refreshed from Google Patents.
US2637648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ferrosilicon
Assignee: Individual
•
Filing: 1948-08-11
•
Granted: 1953-05-05
•
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
2026-10-31 19:00
CPC Classifications
C; C21; C21C; C21C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF UTILIZING A SILICATE OF A BASE METAL OF THE GROUP CONSISTING OF MAGNESIUM, ALUMINUM, POTASSIUM, SODIUM AND LITHIUM WHICH COMPRISES SMELTING A CHARGE COMPRISING SUCH A SILICATE, IRON-BEARING MATERIAL OF THE GROUP CONSISTING OF METALLIC IRON AND IRON OXIDE AND SOLID CARBONACEOUS REDUCING MATERIAL IN AN ELECTRIC FURNACE TO REDUCE TO THE ELEMENTAL STATE AND VAPORIZE THE BASE METAL OF THE SILICATE, TO REDUCE TO THE ELEMENTAL STATE SILICON OF THE SILICATE AND TO FORM MOLTEN METALLIC IRON FOR COLLECTION ELEMENTAL SILICON PRODUCED WITH THE PRODUCTION OF MOLTEN FERROSILICON CONTAINING NOT MORE THAN ABOUT FIFTEEN PERCENT BY WEIGHT OF SILICON, COLLECTING THE VAPORIZED BASE METAL, AND WITHDRAWING THE MOLTEN FERROSILICON FROM THE FURANCE.
Claim 2
Independent Claim
116 words
THE METHOD OF UTILIZING A SILICATE OF A BASE METAL OF THE GROUP CONSISTING OF MAGNESIUM, ALUMINUM, POTASSIUM, SODIUM AND LITHIUM WHICH COMPRISES SMELTING A CHARGE COMPRISING SUCH A SILICATE, IRON-BEARING MATERIAL OF THE GROUP CONSISTING OF METALLIC IRON AND IRON OXIDE AND SOLID CARBONACEOUS REDUCING MATERIAL IN AN ELECTRIC FURNACE TO REDUCE TO THE ELEMENTAL STATE AND VAPORIZE THE BASE METAL OF THE SILICATE, TO REDUCE TO THE ELEMENTAL STATE SILICON OF THE SILICATE AND TO FORM MOLTEN METALLIC IRON FOR COLLECTION ELEMENTAL SILICON PRODUCED WITH THE PRODUCTION OF MOLTEN FERROSILICON CONTAINING NOT MORE THAN ABOUT FIFTEEN PERCENT BY WEIGHT OF SILICON, COLLECTING THE VAPORIZED BASE METAL, AND WITHDRAWING THE MOLTEN FERROSILICON FROM THE FURANCE.
References Cited (Backward Citations)
US904263A
Cited
US927758A
Cited
US1297297A
Cited
US1878939A
Cited
US2294546A
Cited
US2396658A
Cited
US2420564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |