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:
Dec. 27, 1983
Filed:
Sep. 17, 1981
Masami Kobayashi, Hachimanyama, Setagaya-ku, Tokyo, JP;
Other;
Abstract
Stainless steel can be directly plated with gold by a process wherein stainless steel is dipped in an activating solution; the activated stainless steel is subjected to cathodic electrolysis in a cathode electrolytic activation solution and then the treated stainless steel is directly plated with gold. A preferable activating solution contains (i) 3-20 wt. % of HCl, (ii) 2-30 wt. % of H.sub.2 SO.sub.4, (iii) 0.1-5 wt. % of a nonionic or cationic surfactant and (iv) 0.1-20 wt. % of 2-pyrrolidone or N-alkyl-2-pyrrolidone. A preferable cathode electrolytic activation solution contains (i) 5-20 wt. % of H.sub.3 PO.sub.4, (ii) 2-10% HNO.sub.3, (iii) 0.1-5 wt. % of a nonionic or cationic surfactant and (iv) 0.1-20 wt. % of 2-pyrrolidone or N-alkyl-2-pyrrolidone.