Patent ID: 6750186
Filing Date: 2004-06-15
Classification: C11D

Abstract:
A method of removing mineral deposits from the interior of a dishwashing machine, comprisingplacing dishwasher cleaner solid composition in tablet or pellet form, consisting essentially of (1) 5-95% by weight of at least one chelating agent capable of carrying out chelation solubilization of mineral deposits including calcium carbonate, wherein said chelating agent comprises EDTA, (2) 95-5% by weight of a binder matrix material for said chelating, said binder matrix material being solid at less then 120Â° F., and optionally (3) one or more of a colorant, fragrance, preservative, bactericide, anti-foam, acid, corrosion inhibitor and wetting agent, said solid composition being resistant to dissolving or being sparingly soluble in water at temperatures below about 49Â° C., and being capable of substantially dissolving at temperatures greater than 68Â° C. to provide a solution having a pH no greater than 6, within said dishwasher machine, and running said dishwasher machine through a dishwasher cycle.