| 摘要 |
721,114. Batteries. NATIONAL LEAD CO. July 28, 1953 (Aug. 16, 1952], No. 20955/53. Class 53. The active material of an accumulator electrode contains litharge and polyvinyl alcohol with or without finely-divided lead and lead sulphate. Negative electrodes may contain expanders and positive electrodes may include red lead and lead peroxide. The materials may be mixed into a paste with water or dilute sulphuric acid. |
