Patent ID: 7524803

Claim:
A warewashing detergent composition comprising: (a) about 0.5 wt. % to about 20 wt. % of a cleaning agent comprising a detersive amount of a surfactant; (b) about 10 wt. % to about 60 wt. % of an alkaline source comprising alkali metal hydroxide; (c) about 5 wt. % to about 60 wt. % of condensed phosphate; (d) about 0.5 wt. % to about 25 wt. % of a corrosion inhibitor in an amount sufficient for reducing corrosion or etching of glass, the corrosion inhibitor comprising: (i) a source of aluminum ion; and (ii) a source of zinc ion; and (e) the detergent composition is a substantially homogenous solid.