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US3755478A Expired / Lapsed US ⏱️ 0.0 years remaining

Cyclic process for the preparation of diorganomagnesium compounds

Assignee: Lithium Corp of America Inc
•
Filing: 1971-08-18
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Granted: 1973-08-28
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Expires: 1991-08-18
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Abstract

Abstract A CYCLIC PROCESS FOR THE PREPARATION OF DIORGANOMAGNESIUM COMPOUNDS WHICHINVOLVES, FIRST, PREPARING A DIORGANOMAGNESIUM COMPOUND FROM MAGNESIUM METAL AND AN ORGANIC CHLORIDE IN A HYDROCARBON MEDIUM; SECOND, REACTING THE RESULTING MIXTURE OF DIORGANOMAGNESIUM AND MAGNESIUM CHLORIDE WITH SUFFICIENT ORGANOLITHIUM TO REACT WITH THE MAGNESIUM CHLORIDE TO PRODUCE HYDROCARBON-SOLUBLE DIORGANOMAGNESIUM COMPOUNDS; THIRD, SEPARATING THEREFROM THE BY-PRODUCT LITHIUM CHLORIDE AND SBSEQUENTLY REACTING IT WITH AN ALKYL OR ARYL CHLORIDE AND SODIUM METAL TO REGENERATE THE ORGANOLIGHIUM COMPOUND WHICH IS THEN FINALLY RECYCLED TO THE REACTION MIXTURE OFTAINED IN THE FIRST STEP DESCRIBED ABOVE.

Inventors

  • 👤 C Kamienski

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 02:48
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/02

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1976-08-27 1977-02-26 1977-08-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-27 1981-02-26 1981-08-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-27 1985-02-26 1985-08-28 $7700.00 Window Closed / Lapsed

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