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:
Sep. 25, 1990
Filed:
Aug. 29, 1989
Applicant:
Inventors:
Amarnath P Divecha, Falls Church, VA (US);
William A Ferrando, Arlington, VA (US);
Philip W Hesse, Ellicott City, MD (US);
Subhash D Karmarkar, Great Falls, VA (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ; B23K / ;
U.S. Cl.
CPC ...
228193 ; 228208 ; 228254 ; 22826317 ;
Abstract
An aluminum or aluminum alloy surface is coated with molten AgNO.sub.3, the ilver nitrate is decomposed (at about 450.degree. C.-550.degree. C.) leaving a thin layer of silver metal, and then an inter-diffusion layer of silver and aluminum is formed (at about 570.degree. C.-660.degree. C.). The treated surface can be soldered by conventional means.