Patents by Inventor Mitsuji Tokuno

Mitsuji Tokuno 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).

  • Lubricant compositions and methods for preparation of same
    Patent number: 4855073
    Abstract: Disclosed are a lubricant composition comprising a major amount of one or more lubricant fluids and at least one polyvalent metal salt of the formaldehyde condensation products of C.sub.12 -C.sub.22 alkyl hydroxy benzoic acid, and a method of preparation of same. Because of the methylenebis structure of the polyvalent metal salts, engine properties such as detergency/dispersancy, thermal stability, hydrolytic stability, oil solubility and especially compatibility with other additives are improved by the use of the composition.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: August 8, 1989
    Inventors: Mitsuhiro Murakami, Takahiro Mikami, Hiroyuki Nagamatsu, Mitsuji Tokuno