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:
Nov. 17, 2015
Filed:
Feb. 23, 2011
Koji Wada, Kobe, JP;
Mamoru Hosokawa, Kobe, JP;
Takayuki Tsubota, Kobe, JP;
Jun Hisamoto, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
The present invention provides a method for forming an anode oxide film, in which on the assumption that a direct-current power source is used, a thick anode oxide film can be formed with good productivity within a short time without using special equipment. The method includes allowing a current Ato pass through an aluminum base material, and includes a step of repeating a first electricity cut-off treatment multiple times, in which when a voltage reaches a voltage Vduring the formation of the film, the passage of electricity is once cut off, this electricity cut-off is continued for a period equal to or longer than an electricity cut-off time T, and the passage of electricity is then resumed, wherein the voltage Vand electricity cut-off time Tsatisfy the prescribed expressions.