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Expired
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Oswald Loeffler
Wilhelm Weidle
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Individual
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Solid-Sorbent Or Filter-Aiding Compositions
(AREA)
Abstract
6055. L÷ffler, O., and Weldle, W. March 22. Filtering-media.-A filtering-medium is made of asbestos, chalk, fossil meal, and syenite. The materials are finely pulverized, made into a paste with water, pressed into moulds, and burnt.
GB190506055D1905-03-221905-03-22A New or Improved Filtering Material and Method of Producing same.
ExpiredGB190506055A
(en)