Patent DE559799C successfully refreshed from Google Patents.
Patent US3141899A successfully refreshed from Google Patents.
US3141899A
Expired / Lapsed
US
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Preparation of organo-halogenosilanes
Assignee: PQ Corp
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Filing: 1961-05-29
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Granted: 1964-07-21
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Emblem Harold Garton
- 👤 Fleming Richard Charles Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:23
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/745; B01J23/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS WHICH COMRISES: (A) PLACING A FERROSILICON ALLOY IN A FINELY DIVIDED STATE IN A REACTION ZONE, (B) SAID FERROSILICON ALLOY CONTAINING MORE THAN 50 PERCENT BY WEIGHT OF IRON, (C) TREATING SAID FINELY DIVIDED FERROSILICON ALLOY WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE CURPIC SALT, (D) PERMITTIG SAID FERROSILICON ALLOY AND SAID CUPRIC SALT TO REACT TOGETHER IN SAID REACTION ZONE LONG ENOUGH FOR THE CUPRIC SALT TO REPLACE PART OF THE IRON PRESENT IN THE ALLOY BY COPPER, (E) RECOVERING A CONTACT MASS COMPRISING A FERROSILICON ALLOY AND METALLIC COPPER, (F) CONTACTING SAID CONTACT MASS WITH AN ALKYL HALIDE TO PRODUCE ALKYL HALOGENOSILANES.
Claim 2
Dependent Claim
106 words
A PROCESS WHICH COMRISES: (A) PLACING A FERROSILICON ALLOY IN A FINELY DIVIDED STATE IN A REACTION ZONE, (B) SAID FERROSILICON ALLOY CONTAINING MORE THAN 50 PERCENT BY WEIGHT OF IRON, (C) TREATING SAID FINELY DIVIDED FERROSILICON ALLOY WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE CURPIC SALT, (D) PERMITTIG SAID FERROSILICON ALLOY AND SAID CUPRIC SALT TO REACT TOGETHER IN SAID REACTION ZONE LONG ENOUGH FOR THE CUPRIC SALT TO REPLACE PART OF THE IRON PRESENT IN THE ALLOY BY COPPER, (E) RECOVERING A CONTACT MASS COMPRISING A FERROSILICON ALLOY AND METALLIC COPPER, (F) CONTACTING SAID CONTACT MASS WITH AN ALKYL HALIDE TO PRODUCE ALKYL HALOGENOSILANES.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |