Patents by Inventor Naoki Shibahara

Naoki Shibahara 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).

  • Colored polyvinyl chloride paste composition prepared using premixture of pigment and aromatic carboxylic acid ester
    Patent number: 4259225
    Abstract: A colored polyvinyl chloride paste composition comprising(A) a polyvinyl chloride paste, and(B) a powdery coloring agent comprising (1) a pigment and (2) a monomeric ester of an aromatic carboxylic acid, said ester containing 1 to 6 ester bonds (--COO--) in the molecule and having a melting point of at least 40.degree. C.
    Type: Grant
    Filed: February 1, 1979
    Date of Patent: March 31, 1981
    Assignee: Dainippon Ink & Chemicals, Inc.
    Inventors: Isamu Saito, Koshiki Aoyagi, Masatoshi Okumura, Masayoshi Banba, Naoki Shibahara