Patents by Inventor Akio Fuziwara

Akio Fuziwara 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).

  • Optical information recording disk
    Patent number: 4405671
    Abstract: Disclosed herein is an optical information recording disk comprising as a base material thereof a polymer or copolymer having a glass transition temperature of at least 50.degree. C. and a structural unit derived from a monomer which is an ester of an .alpha.,.beta.-unsaturated carboxylic acid and an alicyclic alcohol represented by the general formula: ##STR1## wherein n is an integer of 1-5, R denotes a hydrogen or an alkyl or alkenyl group, and, when n stands for an integer of 2-5, the Rs may be the same or different.The above disk does not develop deformation such as warping or twisting by changes in humidity and is uniform optically.
    Type: Grant
    Filed: January 20, 1982
    Date of Patent: September 20, 1983
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Hiroshi Ozawa, Masaaki Shin, Akio Fuziwara, Mitsuyoshi Nakamura, Ichiro Otsuka, Kazuo Sugazaki