Patents by Inventor Katsuaki Nakao

Katsuaki Nakao 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).

  • Cationic compound, process for preparing same and treatment of textile material for improved dyeing
    Patent number: 4615709
    Abstract: A cationic compound of the formula [I] below is used for improving the dyeing properties of a textile material by treating therewith the textile material before or after dyeing with an anionic dye. ##STR1## wherein A is a group of the formula [II]: ##STR2## wherein p and q are an integer of 1 to 8, n is an integer of 0 to 2, X is halogen, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are (C1-4) alkyl, OH-- or cyano-substituent-having (C1-4) alkyl or (C1-4) alkenyl, and Q.sub.1, Q.sub.2 and Q.sub.3 are: ##STR3## in which Y is halogen.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: October 7, 1986
    Assignee: Ipposha Oil Industries Co., Ltd.
    Inventor: Katsuaki Nakao