Patents by Inventor Tooru Segi

Tooru Segi 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).

  • Method for inhibiting polymerization of (meth) acrylic acid or esters thereof
    Patent number: 5856562
    Abstract: In a method for inhibiting the polymerization of (meth)acrylic acid or esters thereof, the improvement comprising using as a polymerization inhibitor a N-oxyl compound represented by the general formula (1): ##STR1## wherein X represents CH.sub.2, CHOH, C=O, CHCOCH.sub.3 or CHNHCOCH.sub.2, in combination with phosphine compound or a cobalt compound.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: January 5, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Norioki Mine, Tooru Segi