Patents by Inventor Takahumi Hasegawa

Takahumi Hasegawa 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).

  • Recording sheet for an ink jet printer
    Patent number: 5264275
    Abstract: A recording sheet for an ink jet printer, which comprises a substrate, a lower layer of porous pseudo-boehmite having an average pore radius of from 20 to 80 .ANG. formed in a thickness of from 5 to 60 .mu.m on the substrate and an upper layer of porous pseudo-boehmite having an average pore radius of from 40 to 150 .ANG. formed in a thickness of from 2 to 30 .mu.m on the lower layer, the average pore radius of the upper layer being larger than that of the lower layer.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: November 23, 1993
    Assignee: Asahi Glass Company Ltd.
    Inventors: Katsutoshi Misuda, Shinichi Suzuki, Takahumi Hasegawa, Hitoshi Kijimuta