Patents by Inventor Takuro Handa

Takuro Handa 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).

  • Sulfidoxymolybdenum dialkylphosphorodithioate
    Patent number: 4789492
    Abstract: Disclosed is a novel sulfidoxymolybdenum dialkylphosphorodithioate represented by the following general formula (I): ##STR1## wherein R stands for a secondary alkyl group having 4 to 30 carbon atoms and four R's may be the same or different, and X stands for O or S and four X's may be the same or different.This compound is very valuable as the lubricant additive.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: December 6, 1988
    Assignee: Asahi Denka Kogyo K.K.
    Inventors: Shigeru Katsumata, Takuro Handa, Tamiji Kamakura, Noriyoshi Tanaka, Hidekatsu Katoh, Kimiyoshi Namiwa, Yoshikazu Shoji
  • Water-soluble coolant for formation of drawn and ironed cans
    Patent number: 4581152
    Abstract: Disclosed is a water-soluble coolant for formation of drawn and ironed cans, which comprises an aqueous solution containing 0.1 to 20% by weight of a phosphorus-containing compound obtained by esterifying an epoxidation product of at least one higher unsaturated fatty acid or its ester with phosphoric acid.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: April 8, 1986
    Assignees: Toyo Seikan Kaisha, Ltd., Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Hisashi Hotta, Toshiyuki Noda, Yoshiharu Tobita, Isao Watabiki, Yasu Ishimoto, Takuro Handa, Masashi Umemura
  • Sulfur containing molybdenum dihydrocarbyldithiocarbamate compound
    Patent number: 4098705
    Abstract: A compound having the following general formula (I); ##STR1## wherein R.sub.1 and R.sub.2 stand for a hydrocarbyl group having from 1 to 24 carbon atoms, x is a number of 0.5 - 2.3, useful as an additive for lubricants.
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: July 4, 1978
    Assignee: Asahi Denka Kogyo K.K.
    Inventors: Toshio Sakurai, Akio Nishihara, Takuro Handa, Hidekatsu Katoh, Yoshiro Tomoda, Kazumi Aoki, Makoto Yoto