Patents by Inventor Takashi Tazaki

Takashi Tazaki 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).

  • Amphoteric polyelectrolyte, method for production thereof, and organic sludge dehydrater
    Patent number: 5284909
    Abstract: An amphoteric polyelectrolite represented by the general formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are H or alkyl, R.sup.5 is H, alkyl or w-OH substituted alkyl, HY is monobasic acid, and Z is amide.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: February 8, 1994
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Kazutomo Takahashi, Koichi Yamamoto, Kazuo Kodama, Seiichi Suzuki, Takashi Tazaki, Yutaka Morimoto, Hideyuki Nishibayashi
  • Amphoteric polyelectrolite, method for production thereof, and organic sludge dehydrater
    Patent number: 5194515
    Abstract: An amphoteric polyelectrolite represented by the general formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are H or alkyl, R.sup.5 is H, alkyl or w--OH substituted alkyl, HY is monobasic acid, and Z is amide.
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: March 16, 1993
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Kazutomo Takahashi, Koichi Yamamoto, Kazuo Kodama, Seiichi Suzuki, Takashi Tazaki, Yutaka Morimoto, Hideyuki Nishibayashi