Patents by Inventor Mitsuru Echigoya

Mitsuru Echigoya 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 producing polymer solutions of polymers or copolymers of vinyl chloride series
    Patent number: 4013608
    Abstract: A method of producing a polymer or copolymer solution of vinyl chloride series, wherein polymerization of 100 parts by weight of a monomer mixture of at least 50 weight percent of vinyl chloride and less than 50 weight percent of one or more monomers copolymerizable therewith is carried out in a solvent mixture consisting essentially of 30 to 55 weight percent water, remainder N,N-dimethyl formamide, in the presence of 0.5 to 5 parts by weight of a salt of a monomeric compound having a sulphonic acid group and using an initiator for radical polymerization.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: March 22, 1977
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Fumiya Nagoshi, Hideyuki Arakawa, Hayashi Uchino, Mitsuru Echigoya, Masaki Matsuo