1 result for “Owens-Corning Fiberglas”
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Patent · November 9, 1926
Method of Preparation of Diatomaceous Earth (US Patent 1,606,281, 1926)
…1,606,281 on November 9, 1926, filed July 15, 1925. The patent's description opens (from the scanned text): This invention relates to the preparation of diatomaceous' earth for use in filters and the like.