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:
Jun. 04, 2019
Filed:
Aug. 20, 2014
Toyo Kohan Co., Ltd., Tokyo, JP;
Nippon Paint Surf Chemicals Co., Ltd., Tokyo, JP;
Toyo Seikan Co., Ltd., Tokyo, JP;
Kunihiro Yoshimura, Yamaguchi, JP;
Masanobu Matsubara, Yamaguchi, JP;
Marie Sasaki, Yamaguchi, JP;
Masahiko Matsukawa, Tokyo, JP;
Keisuke Yoshida, Tokyo, JP;
Wataru Kurokawa, Kanagawa, JP;
Munemitsu Hirotsu, Kanagawa, JP;
Mitsuhide Aihara, Kanagawa, JP;
TOYO KOHAN CO., LTD., Tokyo, JP;
TOYO SEIKAN CO., LTD., Tokyo, JP;
Abstract
Provided is a method for producing a surface-treated steel sheet including the step of forming a layer mainly composed of an oxygen compound containing Al onto a tin-plated steel sheet by conducting cathode electrolytic treatment to the tin-plated steel sheet using an electrolytic treatment solution containing Al ions and nitrate ions. For the electrolytic treatment solution, an electrolytic treatment solution not containing F ions and where the amount of nitrate ions contained is 11,500 to 25,000 ppm by weight is used.