Patents by Inventor Masaru Uryu

Masaru Uryu 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).

  • Diaphragm and method for producing same
    Patent number: 5180785
    Abstract: A diaphragm formed of a material for molding mainly composed of a uniform mixture of an ultra-high molecular weight polyolefin with a high melting viscosity and a polyolefin with a lower melting viscosity, wherein the ultra-high molecular weight polyolefin is extensively oriented by the lubricating action of polyolefin having the lower melting viscosity and the method for producing the diaphragm. The diaphragm superior in specific modulus of elasticity and internal losses may be produced by producing the polyolefin composition by multi-stage polymerization and injection molding the composition for radially orienting the molecular chains of the ultra-high molecular weight polyolefin.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: January 19, 1993
    Assignee: Sony Corporation
    Inventors: Masaru Uryu, Kunihiko Tokura, Kyouji Muraoka
  • Acoustic material
    Patent number: 5098976
    Abstract: This invention provides an acoustic material having high elastic modulus and large internal loss by subjecting a high-modulus stretched polyethylene containing paraffin wax to plasma treatment. When the acoustic material of the present invention is used for a diaphragm of a speaker, for example, it is possible to suppress the fluctuation of frequency characteristics resulting from split vibration, decrease harmonic distortion and improve transient characteristics.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: March 24, 1992
    Assignees: Sony Corporation, Mutsui Petrochemical Industries
    Inventors: Masaru Uryu, Yoshio Nishi, Kazuo Yagi
  • Bacterial cellulose-containing molding material having high dynamic strength
    Patent number: 4742164
    Abstract: A molding material having high dynamic strength which contains bacterial cellulose having ribbon-shaped microfibrils.Such material is advantageously used as a reinforcing material for composite plastics having high strength, as high quality paper or as acoustic diaphragms for percussion instruments.
    Type: Grant
    Filed: April 16, 1986
    Date of Patent: May 3, 1988
    Assignees: Agency of Industrial Science and Technology, Sony Corporation, Ajinomoto Co., Inc.
    Inventors: Masatoshi Iguchi, Shigenobu Mitsuhashi, Kunihiro Ichimura, Yoshio Nishi, Masaru Uryu, Shigeru Yamanaka, Kunihiko Watanabe