US Patent No. 10,301,578 B2 (Nathalie Sophie Letzelter, Rachel Elizabeth Martin); Procter & Gamble
has patented a method of cleaning soiled dishes in a dishwasher. It entails subjecting the load to a wash liquor comprising at least 900ppm of an aminocarboxylated complexing agent. The liquor, which is free of phosphate, dispersant polymer, sulfonated polymer and carboxylated polymers, is comprised of a crystal growth inhibitor, wherein the complexing agent is selected from the group consisting of methyl glycine diacetic acid and its salts. The liquor has a hardness greater than 140mg hardness ions/L.
P&G has also been awarded US Patent No. 10,301,574 B2 (Marc Johan Declercq, Hans-Jurgen Kohle, Pieter Jan Maria Saveyn) for a fabric enhancer comprising from a fabric softening active of formula that contains either hydrogen, a short chain C1-C6 alkyl, C1-C3 hydroxyalkyl group, a poly(C2-3 alkoxy), or benzyl; a hydrocarbyl group or substituted hydrocarbyl group comprising about 11 to about 21 carbon atoms; and a fabric enhancer compatible anion. The composition has no more than approximately 50% by weight of diester quaternary ammonium compound.