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:
Apr. 02, 1991
Filed:
May. 04, 1990
Applicant:
Inventor:
Samuel V Bristol, Kokomo, IN (US);
Assignee:
Delco Electronics Corporation, Kokomo, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
148 23 ; 148 22 ; 148 24 ; 148 25 ;
Abstract
A low residue soldering flux contains a non-subliming dibasic acid mixture of by weight about 15-30% succinic acid, 40-63% glutaric acid and 10-30% adipic acid, e.g., in a volatilizable organic solvent, formed as a rosin-containing or rosin-free flux. The dibasic acid mixture is capable of volatilizing during heat soldering to leave a soldered product (e.g., an electronic circuit board) essentially free from corrosion-promoting ionic residue. This eliminates the need for a residue-removing washing step.