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:
Mar. 21, 1978
Filed:
Aug. 29, 1975
Applicant:
Inventors:
Yuichi Suzuki, Kawasaki, JA;
Toshito Hara, Kawasaki, JA;
Assignee:
Fujitsu Limited, , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ; C23G / ; C21D / ;
U.S. Cl.
CPC ...
148 203 ; 134-2 ; 156625 ; 156664 ; 204 / ; 204 34 ; 427 62 ; 427307 ;
Abstract
A niobium containing alloy amterial is initially annealed in a hydrogen atmosphere at a temperature approximating 700.degree. C. The alloy material is then immersed in an aqueous solution of approximately between 1.0%-20.0% by weight of sodium hydroxide being maintained at a temperature of at least 70.degree. C. Immersion of the alloy material in the aqueous solution removes niobium oxide which is formed in the surface portion of the alloy material during the annealing step. After removal of the alloy material from the aqueous solution, the alloy material is plated on its surface with an electric contact material.