| 摘要 |
1,142,756. Cellular plaster. NIAGARA FOAM PRODUCTS Inc. 25 Jan., 1967 [1 Feb., 1966], No. 3796/67. Heading C1H. [Also in Divisions A2 and A4] A cellular gypsum composition comprises a major amount of alpha gypsum with silica, Portland cement, potassium sulphate and sodium citrate. Optionals are gum arabic, lime, glycosides, clay, chrome ore, talc, mica, asbestos, pigments, dyes and wetting or foaming agents. |
