Patents by Inventor Masatake Fukushima

Masatake Fukushima 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: 4939762
    Abstract: An X-ray target having a graphite body and an X-ray generating metal coating layer, in that a metal interlayer which is non-reactive with graphite and which has a coefficient of thermal expansion substantially equal to those of the graphite and the X-ray generating metal coating layer is formed at the boundary between the graphite body and the X-ray generating metal coating layer, and that the interlayer is caused to percolate into the graphite body. Desirably, the interlayer includes a part percolating into the graphite body over a depth of at least 10 .mu.m. The X-ray target can be manufactured in such a way that the surface of the graphite body is coated with the metal interlayer by subjecting the surface to chemical vapor deposition under a normal pressure or under a pressure near the normal pressure, and that the metal interlayer is thereafter coated with an X-ray generating metal by an expedient such as chemical vapor deposition, sputtering or thermal spraying.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: July 3, 1990
    Assignees: Hitachi, Ltd., Hitachi Medical Corporation
    Inventors: Noboru Baba, Yusaku Nakagawa, Masatake Fukushima, Masateru Suwa, Ichiro Inamura