1 result for “Owens-Illinois”
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Patent · September 15, 1959
Method of making calcareous-silicious insulating material (US Patent 2,904,444, 1959)
…September 15, 1959, filed November 26, 1957. The patent's description opens (from the scanned text): This invention relates to calcareous-silicious heat insulating material, and more particularly to an improved method of making such material.