Patents by Inventor Noboru Monma

Noboru Monma 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).

  • Resin composition with low shrinkage
    Patent number: 4233413
    Abstract: A resin composition comprising (A) 25 to 45 parts by weight of an unsaturated polyester having special structure, (B) 40 to 60 parts by weight of polymerizable monomer such as styrene, and (C) 4.5 to 15 parts by weight of a polystyrene, has low shrink properties and excellent electrical properties when molded, particularly by casting.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: November 11, 1980
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Noboru Monma, Iwao Maekawa, Tutomu Sarudate, Hidetaka Sato, Isao Uchigasaki
  • Resin composition having low shrink properties
    Patent number: 4228251
    Abstract: A resin composition which comprises (A) 50 to 90 parts by weight of an unsaturated ester oligomer produced by reacting a glycol, hydroxylated dicyclopentadiene, and at least one unsaturated dibasic acid or anhydride thereof until an acid value of less than 40, (B) 50 to 10 parts by weight of one or more polymerizable monomers, and (C) 3 to 15 parts by weight of polystyrene based on 100 parts by weight of the total of the components (A) and (B), can give molded articles having low shrink properties and improved color shading, cracks, etc.
    Type: Grant
    Filed: November 30, 1978
    Date of Patent: October 14, 1980
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Iwao Maekawa, Isao Uchigasaki, Noboru Monma