| 摘要 |
<p>522,776. Waterproofing walls. PICK, E. May 8, 1939, No. 13763. [Classes 20 (ii) and 20 (iv)] [Also in Group IX] A coating material, resistant to moisture rotting &c., for walls comprises a mixed fabric woven partly from canvas and partly from vegetable or animal threads impregnated with a solution of glue mixed with chalk, potassium water glass, black carbolic acid and potassium chromate. All the warp or weft may be of metal filaments, or one or more such filaments may be woven between groups or fibrous threads. Supplementary metal filaments extending at an angle to the warp and weft may be woven into the fabric.</p> |
