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. 26, 2002
Filed:
Aug. 18, 1999
Applicant:
Inventors:
Assignee:
Solvay Fluor und Derivate GmbH, Hannover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 7/54 ; B23K 3/534 ;
U.S. Cl.
CPC ...
C01F 7/54 ; B23K 3/534 ;
Abstract
The production of a potassium fluoroaluminate having a low melting point, which can be used as a flux when soldering aluminum. The potassium fluoroaluminate is prepared in an aqueous medium from aluminum hydroxide, hydrogen fluoride and potassium hydroxide in a molar ratio of aluminum:fluorine:potassium of approximately 1:5:2. After drying at 80° C. under vacuum, the resulting potassium fluoroaluminate has a differential scanning calorimetry melting point of about 548° C.