US3034886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for refining silicon and ferrosilicons and resultant products
Assignee: ELECTROMETALLURGIQUE DE MONTRI
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Filing: 1960-10-25
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Granted: 1962-05-15
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Expires: 1980-10-25
Abstract
No abstract record available.
Inventors
- 👤 Pruvot Emile
- 👤 Laparra Maurice
- 👤 Lugagne Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:21
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/46; B21B1/463; B22; B22D; B22D11/00; B22D11/06; B22D11/0622; C; C01; C01B; C01B33/00; C01B33/02; C01B33/037; C01B33/06; C22; C22B; C22B9/00; C22B9/05; C22B9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR REFINING A MATERIAL SELECTED FROM THE CLASS CONSISTING OF SILICON AND FERROSILICONS, COMPRISING THE STEPS: HEATING THE MATERIAL TO BRING THE SAME INTO THE LIQUID STATE, AND INJECTING THEREIN A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF SILICON FLUORIDE AND COMPOUNDS ADAPTED TO GIVE OFF SILICON FLUORIDE AT THE TEMPERATURE PREVAILING WITHIN THE LIQUID MATERIAL.
Claim 2
Dependent Claim
58 words
A PROCESS FOR REFINING A MATERIAL SELECTED FROM THE CLASS CONSISTING OF SILICON AND FERROSILICONS, COMPRISING THE STEPS: HEATING THE MATERIAL TO BRING THE SAME INTO THE LIQUID STATE, AND INJECTING THEREIN A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF SILICON FLUORIDE AND COMPOUNDS ADAPTED TO GIVE OFF SILICON FLUORIDE AT THE TEMPERATURE PREVAILING WITHIN THE LIQUID MATERIAL.
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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) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |