Patent US4436956A successfully refreshed from Google Patents.
US3138450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicon alloys containing one or more relatively volatile metals
Assignee: GEA Group AG
•
Filing: 1960-03-24
•
Granted: 1964-06-23
•
Expires: 1980-03-24
Abstract
No abstract record available.
Inventors
- 👤 Figge Kurt
- 👤 Kaess Franz
- 👤 Pfluger Erich
- 👤 Bavaria Upper
- 👤 Drost Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:04
CPC Classifications
—
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PRODUCTION OF HOMOGENEOUS SILICON CONTAINING ALLOYS CONTAINING AT LEAST 15% OF SILICON AND AT LEAST ONE METAL SELECTED FROM THE GROP CONSISTING OF MAGNESIUM AND CALCIUM WHICH COMPRISES MELTING THE COMPONENTS OF THE ALLOY IN A CRUCIBLE PRODUCED FROM CARBON CONTAINING MATERIAL IN AN INDUCTION FURNACE, HOMOGENIZING THE RESULTING MELT BY INDUCTION AND CASTING AND COOLING THE ALLOY TO SOLIDIFY IT BEFORE SEGRETATION OF THE COMPONENTS CAN TAKE PLACE THEREIN.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PRODUCTION OF HOMOGENEOUS SILICON CONTAINING ALLOYS CONTAINING AT LEAST 15% OF SILICON AND AT LEAST ONE METAL SELECTED FROM THE GROP CONSISTING OF MAGNESIUM AND CALCIUM WHICH COMPRISES MELTING THE COMPONENTS OF THE ALLOY IN A CRUCIBLE PRODUCED FROM CARBON CONTAINING MATERIAL IN AN INDUCTION FURNACE, HOMOGENIZING THE RESULTING MELT BY INDUCTION AND CASTING AND COOLING THE ALLOY TO SOLIDIFY IT BEFORE SEGRETATION OF THE COMPONENTS CAN TAKE PLACE THEREIN.
References Cited (Backward Citations)
US2197660A
Cited
US2837422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |