Abstract: A binary lead-tin alloy substrate for support of the electrochemically active material in lead-acid cells is disclosed having a tin concentration from about 0.3 to about 0.9 weight percent, the balance being lead. The tin impedes the formation of a passivation layer at the interface between the grid material and the active material improving cell recovery from deep discharge and improving cold cranking amperes performance.

Abstract: A normally sealed starved electrolyte recombinant lead-acid cell of high discharge rate capability whose plates have a thickness from about 0.007 to about 0.027 inches, and whose grids are formed of high hydrogen overvoltage lead with a thickness of from about 0.005 inches to no more than 0.019 inches, with an inter-plate spacing of typically from about 0.005 to about 0.020 inches.

Abstract: A sealed gas recombining lead-acid cell with absorbed electrolyte is produced by assembling unformed plates and high porosity glass mat separator whose surface area is from 0.2-1.7 m.sup.2 /g, adding a limited quantity of acid into the cell, and then either prior to or after sealing of the cell electrochemically forming the plates of the cell in situ. High rate performance of the cell is significantly improved over cells using conventional high surface area glass separators.

Abstract: A sealed gas recombining lead-acid cell with absorbed electrolyte is produced by assembling unformed plates and high porosity glass mat separator whose surface area is from 0.2-1.7 m.sup.2 /g, adding a limited quantity of acid into the cell, and then either prior to or after sealing of the cell electrochemically forming the plates of the cell in situ. High rate performance of the cell is significantly improved over the cells using conventional high surface area glass separators.

Abstract: A preferably sealed lead-acid battery having a microfine glass separator pasting paper integrated with its adjoining plate, and the associated method by which the separator pasting paper is applied directly to the freshly pasted plate.

Abstract: BOD-containing water is purified by oxygenation. The resulting sludge is subjected to flotation with a gas having a solubility in water higher than that of air.The preferred source of high solubility gas is the vent gas from the oxygenation zone or stack gas obtained by burning methane generated by anaerobically digesting the floated solids.Removal of insoluble contaminants from bacterial or bacterial-algal pond effluent using high solubility gas flotation is also disclosed.

Abstract: Sheet extrusion of elastomeric material wherein an extruded strand is passed through a die having a symmetrical runner system which divides and subdivides said strand into multiple strands equal in length and cross section, and then gradually transforms the multiple strands into laterally adjoining flattened triangular portions in which substantially the same cross-sectional area is maintained as the cross-sectional shape changes, with alternate triangular portions overlapping the other triangular portions in staggered relation and all of said triangular portions terminating in a continuous lateral exit slot.