Patents by Inventor Masataka Yanase

Masataka Yanase 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).

  • Method of making a light-polarizing plate
    Patent number: 4626304
    Abstract: A light-polarizing plate for display use is improved in its humid, thermal and weather durabilities by controlling moisture content of a light-polarizing film made of polyvinylalcohol prior to be laminated with protector film and also by using as protector film a hydrophobic polymer film having low water vapor transmission.
    Type: Grant
    Filed: September 17, 1985
    Date of Patent: December 2, 1986
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takuzo Okumura, Masataka Yanase, Hitoshi Kikui
  • Light-polarizing plate having excellent durability and production of the same
    Patent number: 4564545
    Abstract: A light-polarizing plate for display use is improved in its humid, thermal and weather durabilities by controlling moisture content of a light-polarizing film made of polyvinylalcohol prior to be laminated with protector film and also by using as protector film a hydrophobic polymer film having low water vapor transmission.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: January 14, 1986
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takuzo Okumura, Masataka Yanase, Hitoshi Kikui
  • Method for production of casting syrups
    Patent number: 4110526
    Abstract: In the production of a casting syrup, useful in a continuous casting process for manufacture of cast plates, by partial polymerization of methyl methacrylate or its mixture with at least one unsaturated vinyl compound copolymerizable therewith in an amount of not more than about 20% by weight based on methyl methacrylate, an improved method wherein the partial polymerization is carried out in the presence of a thiodicarboxylic acid ester of the formula:R.sub.3 OOCR.sub.1 --S--R.sub.2 COOR.sub.4wherein R.sub.1 and R.sub.2 are each an alkylene group having 1 to 6 carbon atoms and R.sub.3 and R.sub.4 are each an alkyl group having 1 to 24 carbon atoms as a stabilizer using an azo compound as a polymerization initiator, whereby a casting syrup having a suitable viscosity with a good workability on casting and affording a cast plate of high thermal stability on completion of the polymerization is obtainable.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: August 29, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takaki Hamada, Hiroyuki Kanazawa, Masataka Yanase