US Patent: 3,140,321
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| Preparation of Grignard Reagents in Predominantly Hydrocarbon Media
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Patentees:
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| George J. Goepfert (exact or similar names) - Cincinnati, Hamilton County, OH |
| Alfred H. Frye (exact or similar names) - Cincinnati, Hamilton County, OH |
| Victor G. Soukup (exact or similar names) - Wyoming, Hamilton County, OH |
| Francis J. Buescher (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 16, 1960 |
| Granted: |
Jul. 07, 1964 |
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Joel Havens
"Vintage Machinery" entry for Cincinnati Milling Machine Co.
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