Patents by Inventor Kazuo Doi

Kazuo Doi 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).

  • Novel solid thermosetting resins and processes for preparing same
    Patent number: 3957903
    Abstract: A two-stage process for producing a three-component graft copolymer of 1,2-polybutadiene, glycidyl methacrylate and a second monomer. By first reacting glycidyl methacrylate on the polymeric substrate and then reacting the second monomer to form a non-crosslinked graft copolymer, high curing rates are obtained. By forming a solvent solution of the grafted product, an epoxy hardener and a radical polymerization initiator, a varnish suitable for forming dielectric prepregs is obtained.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: May 18, 1976
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kazuo Doi, Takeru Murakami, Yoshinobu Nakano