| 摘要 |
876,389. Battery separators. GRACE & CO., W. R. Aug. 21, 1959 [Aug. 29, 1958], No. 28615/59. Class 53. Separators made of a fibrous material (e.g. paper (impregnated with a thermosetting synthetic resin are sprayed or otherwise coated with an aqueous solution of sodium or potasium silicate to act as a wetting agent. The application of heat to cure the resin also dry the silicate. Specifications 751,888 and 811,138 are referred to. |
