US2776885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing ferrosilicon
Assignee: Stamicarbon BV
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Filing: 1954-01-04
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Granted: 1957-01-08
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Expires: 1974-01-04
Abstract
No abstract record available.
Inventors
- 👤 Koopal Sieds
- 👤 Pierre L Smit
- 👤 Willem Van Loon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:35
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A PROCESS FOR PRODUCING FERROSILICION BY HEAT REACTING A MIXTURE OF FUEL WHICH IS PRIMARILY CARBON, SILICA AND A MEMBER OF THE GROUP CONSISTING OF IRON AND IRON OXIDE IN THE PRESENCE OF AN OXYGEN-CONTAINING BLAST, THE IMPROVEMENT WHEREBY FERROLILICON CONTAINING 25-55% SILICON AND DESIRABLE INFLAMMABLE GASES ARE OBTAINED, SAID IMPROVEMENT COMPRISING UTILIZING, AS SAID OXYGEN-CONTAINING BLAST, A GASEOUS MIXTURE CONSISTING ESSENTIALLY OF 65-90% BY VOLUME OXYGEN AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF STEAM AND CARBON DIOXIDE.
Claim 2
Dependent Claim
82 words
IN A PROCESS FOR PRODUCING FERROSILICION BY HEAT REACTING A MIXTURE OF FUEL WHICH IS PRIMARILY CARBON, SILICA AND A MEMBER OF THE GROUP CONSISTING OF IRON AND IRON OXIDE IN THE PRESENCE OF AN OXYGEN-CONTAINING BLAST, THE IMPROVEMENT WHEREBY FERROLILICON CONTAINING 25-55% SILICON AND DESIRABLE INFLAMMABLE GASES ARE OBTAINED, SAID IMPROVEMENT COMPRISING UTILIZING, AS SAID OXYGEN-CONTAINING BLAST, A GASEOUS MIXTURE CONSISTING ESSENTIALLY OF 65-90% BY VOLUME OXYGEN AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF STEAM AND CARBON DIOXIDE.
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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |