Patents by Inventor Saburo Hayano

Saburo Hayano 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).

  • Preparation method of amino resin particulate having narrow particle size distribution
    Patent number: 5049645
    Abstract: A continuous preparation method of an amino resin particulate having a maximum particle size of 40 .mu.m or less and an average particle size of from 5 to 15 .mu.m is described. The method comprises the steps of reacting amino compounds with aldehydes in the presence of an acid catalyst in an aqueous solution to form a solid product and classifying said solid product in the form of a slurry with a combination of at least two grinders and at least two classifiers.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: September 17, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Muneo Nagaoka, Saburo Hayano