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Improvements in and relating to the separation of dry materials. Colin William Higham Holmes, Birtley Company, June 8, 1931: GB350497-A (5 worldwide citation)

350,497. Separating solid materials. HOLMES, C. W. H., Deneside, Alverstone Avenue, Low Fell, and BIRTLEY CO., Ltd., Birtley, both in Durham. Dec. 7, 1929, No. 37626. [Class 117.] Apparatus for separating mixtures of substances, e.g. coal and shale, comprises a rotating cylinder 1 of glass or other ...


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Improvements in or relating to the treatment of brick, concrete, tile or like surfaces. Henry Etherington Doughty, June 8, 1931: GB350445-A (2 worldwide citation)

350,445. Colouring surfaces of tiles, bricks, &c. DOUGHTY, H. E., The Elms, Staunton, near Coleford, Gloucestershire. March 8, 1930, Nos. 7629 and 9897. Drawings to Specification. [Class 87 (i).] In a process for treating the surfaces of tiles, bricks, slates, asbestos, concrete, plaster, &c., the s ...


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