Patents by Inventor Kenzo Hamada

Kenzo Hamada 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).

  • Polyolefin plastic compositions
    Patent number: 4016118
    Abstract: A polyolefin plastic composition having improved transparency and reduced molding shrinkage, which consists essentially of at least one polymer or copolymer of an aliphatic monoolefin and dibenzylidene sorbitol, the proportion of the dibenzylidene sorbitol being 0.1 to 0.7% by weight based on the total weight of the composition.
    Type: Grant
    Filed: August 12, 1975
    Date of Patent: April 5, 1977
    Assignees: E. C. Chemical Industries & Co., Ltd., C. Itch & Co., Ltd.
    Inventors: Kenzo Hamada, Hiroshi Uchiyama