Patents by Inventor Sanetsugu Mishima

Sanetsugu Mishima 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).

  • Process for producing improved vinyl chloride polymers
    Patent number: 3951925
    Abstract: Polymer or copolymer of vinyl chloride having superior properties can be produced by suspension-polymerizing vinyl chloride or a mixture thereof with another vinyl monomer, at first, in the presence of an oil-soluble radical initiator, and thereafter, when the percentage of polymerization of the resulting polymer has reached about 15% to about 80%, subjecting the polymer to a further polymerization in the presence of a water-soluble radical initiator.The product thus obtained has both the merits resulting from suspension polymerization and emulsion one. It has an extremely high absorptivity of plasticizer, easy processability, and film made therefrom has substantially no fish eye.
    Type: Grant
    Filed: July 13, 1973
    Date of Patent: April 20, 1976
    Assignee: Chisso Corporation
    Inventors: Sanetsugu Mishima, Tsutomu Matsubara, Hiroyuki Fujii, Kazumasa Funada, Masataka Torigoe