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:
May. 12, 2026
Filed:
Jun. 11, 2021
National University Corporation Hokkaido University, Sapporo, JP;
Uacj Corporation, Tokyo, JP;
Tatsuya Kikuchi, Sapporo, JP;
Miu Sato, Sapporo, JP;
Junji Nunomura, Sapporo, JP;
Yoshiyuki Oya, Aichi, JP;
National University Corporation Hokkaido University, Sapporo, JP;
UACJ Corporation, Tokyo, JP;
Abstract
An aluminum member () includes: a base material () composed of aluminum or an aluminum alloy; and an anodic oxide film () formed on a surface of the base material. The anodic oxide film includes: an amorphous layer (), which is composed of an amorphous aluminum oxide and is formed on the base material (); and a crystal layer (), which is composed of a crystalline aluminum oxide and is formed on the amorphous layer (). The aluminum member () can be obtained by forming the anodic oxide film () on the base material () by performing an anodization process on the base material () in an electrolytic solution, which contains boron atoms and has a pH of 7.0-12.0.