Patents by Inventor Akitoshi Takahira

Akitoshi Takahira 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).

  • Aqueous emulsion and easily macerating moisture-proof paper
    Patent number: 5527623
    Abstract: An aqueous emulsion comprising a copolymer comprising ethylene, vinyl chloride, and vinyl acetate and having a glass transition temperature of from -15.degree. to 35.degree. C., an emulsion of a rosin ester having a softening point of from 110.degree. to 150.degree. C. and a Gardner color scale of not higher than 5, and an emulsion of a wax having a melting point of from 50.degree. to 100.degree. C., and an easily macerating water-proof paper obtained by coating the aqueous emulsion on at least one surface of a base paper. The paper coated with the aqueous emulsion has excellent moisture-proof property, water repellency, and easily macerating property, and does not cause blocking.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: June 18, 1996
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Akitoshi Takahira, Yuuzi Yoshii
  • Aqueous emulsion and easily macerating moisture-proof paper
    Patent number: 5466735
    Abstract: An aqueous emulsion comprising a copolymer comprising ethylene, vinyl chloride, and vinyl acetate and having a glass transition temperature of from -15.degree. to 35.degree. C., an emulsion of a rosin ester having a softening point of from 110.degree. to 150.degree. C. and a Gardner color scale of not higher than 5, and an emulsion of a wax having a melting point of from 50.degree. to 100.degree. C., and an easily macerating water-proof paper obtained by coating the aqueous emulsion on at least one surface of a base paper. The paper coated with the aqueous emulsion has excellent moisture-proof property, water repellency, and easily macerating property, and does not cause blocking.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: November 14, 1995
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Akitoshi Takahira, Yuuzi Yoshii