US Patent: 3,634,243
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| Method of Removing Suspended Matter from Cutting Fluids and Cutting Oils by Addition of Cationic Surfactants
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Patentees:
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| Robert F. Wessels (exact or similar names) - Cincinnati, Hamilton County, OH |
| Ralph Kelly (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: |
Jan. 09, 1969 |
| Granted: |
Jan. 11, 1972 |
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Joel Havens
"Vintage Machinery" entry for Cincinnati Milling Machine Co.
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