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:
Feb. 14, 1995
Filed:
Nov. 10, 1992
Theodore D Held, III, Grosse Pointe Farms, MI (US);
Henkel Corporation, Plymouth Meeting, PA (US);
Abstract
An effective phosphate free and organic solvent free aqueous acidic cleaner for soiled plastic surfaces is an aqueous solution or dispersion that has a pH in the range from about 4.4--about 6.1; that has a buffering capacity sufficiently high that at least 0.06 milliequivalents of a strong alkali per liter of the composition must be added to raise the pH of the composition by 0.1 pH unit; and that consists essentially of water and: (A) from about 0.4 to about 10 milliequivalents per kilogram of total composition ('mEq/kg') of acids selected from the group consisting of hydroxycarboxylic and dicarboxylic acids; (B) from about 1.4 to about 20 mEq/kg of salts containing anions of acids selected from the group consisting of hydroxycarboxylic and dicarboxylic acids; and (C) from about 0.21 to about 3.3 grams per kilogram of total composition ('g/kg') of nonionic surfactant; and, optionally, (D) an amount of hydrotrope material that is from about 0.25 to about 0.75 times the amount in g/kg of component (C); and (E) a sufficient amount of biocidal material to inhibit growth of any bacteria and fungi that may be present in the composition.