Patents by Inventor Tsugumi Ikegaya

Tsugumi Ikegaya 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).

  • Surface treatment agent for paper
    Patent number: 5079303
    Abstract: A surface treatment agent for paper comprising a quaternized product of a copolymer containing at least (a) styrene and/or a styrene derivative and (b) N,N-dialkylaminoalkyl (meth) acrylamide is disclosed. This surface treatment agent is excellent in slip prevention and sizing effect, the sizing effect not being impaired at a pH over 7.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: January 7, 1992
    Assignee: DIC-Hercules Chemicals, Inc.
    Inventors: Tsuyoshi Ikeda, Toshiyuki Hakata, Tsugumi Ikegaya