The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 1994
Filed:
Aug. 27, 1992
Lenore E Savio, Somerset, NJ (US);
Raymond S Brown, Bridgewater, NJ (US);
Church & Dwight Co., Inc., Princeton, NJ (US);
Abstract
The present invention is based upon the discovery that a low-phosphate automatic dishwashing composition comprising from about 2.0 to 50.0 percent by weight of alkali metal carbonate salts such that it contains a weight ratio of about 1:1 to 20:1 carbonate to bicarbonate, from about 2.0 to 60.0 percent by weight of a water-soluble organic complexing agent comprising one or more hydroxycarboxylic acids or the salts thereof, a sufficient amount of an alkaline condensed phosphate salt to provide from about 0.1 to 1.7 percent by weight of (P.sub.2 O.sub.5) ion, from about 0.5 to 8.0 percent by weight of about a 2:1 to a 6:1 blend of an acrylic polymer comprising a salt or ester of acrylic or methacrylic acid having a molecular weight of between about 1,000 to 25,000, with a copolymer of a substituted or unsubstituted maleic anhydride and lower olefin having a molecular weight of from about 1,000 to 50,000, and from about 0.5 to 8.0 percent by weight of a nonionic surfactant provides satisfactory cleaning without unacceptable spotting and filming and without the need to add a chlorinated agent.