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US 7,243,664 B2Granted
Automatic dishwashing composition with corrosion inhibitors
AssigneeThe Procter & Gamble Company
InventorsPatricia Sara Berger, Patti Jean Kellett
Life of this patent
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Abstract
A method of preventing corrosion of metals such as stainless steel, carbon steel and chrome plated flatware in automatic dishwashers through the use of a corrosion inhibitor in an automatic dishwashing detergent composition.
Claims9
A method of preventing corrosion of stainless steel, carbon steel or chrome plated flatware in an automatic dishwashing machine comprising the steps of:
- placing stainless steel, carbon steel or chrome plated flatware in an automatic dishwashing machine;
- and
- contacting the stainless steel, carbon steel or chrome plated flatware with an automatic dishwashing composition comprising a corrosion inhibitor selected from the group consisting essentially of:
- a mixture of benzoic acid, ethanolamine and di-fatty acid;
- a mixture of cyclohexylamine, benzoic acid, ethanolamine and di-fatty acid;
- a mixture of alkyne nonionic surfactant and a methyl butyrol and any combinations of the above mentioned corrosion inhibitors.
3 more elements
Dependencies are inferred from the claim text.