Patents by Inventor Yasuhiro Hanazima

Yasuhiro Hanazima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4606796
    Abstract: A colored, anodized aluminum-base article including an aluminum-base substrate, and first and second anodized aluminum oxide films overlaid thereon. The inner, second film has a hardness of about 330 Hv or more, while the outer, first film is more porous than the second film and has a hardness of about 270 Hv or less. The first film is colored with a coloring agent. The article is prepared by anodizing an aluminum-base substrate in an electrolyte bath at a temperature of 20.degree.-40.degree. C. and, subsequently at a temperature not higher than 10.degree. C., the resultant substrate having two types of anodic aluminum oxide films formed thereon being subjected to a coloring treatment.
    Type: Grant
    Filed: May 20, 1985
    Date of Patent: August 19, 1986
    Assignee: Asahi Malleable Iron Co., Ltd.
    Inventors: Yasuhiro Hanazima, Norihiro Ogawa, Masumi Sugioka