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:
Aug. 25, 1992
Filed:
Oct. 31, 1990
Raymond L Turner, La Habra, CA (US);
Kirk E Johnson, Diamond Bar, CA (US);
Larry L Kimmel, Garden Grove, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A non-toxic, non-corrosive water-soluble soldering paste comprises at least about 80 wt % of particulate solder and the balance a thixotropic flux base. The flux base has a viscosity of at least about 200,000 cp and comprises (a) a botanical oil, (b) an aqueous emulsion of a thickening agent, such as corn starch or an ethoxylated linear alcohol in water, and (c) an organic acid having at least two carboxylic acid groups, such as citric acid. The paste of the invention produces solder joints of high metallic luster and excellent quality. Clean-up of paste residues is ac complished using only water.