Patents by Inventor Jiro Hiromoto

Jiro Hiromoto 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).

  • N-chydroxyphenyl)maleimide-isobutylene copolymer
    Patent number: 4816523
    Abstract: An N-(hydroxyphenyl)maleimide-isobutylene copolymer having the following repeating units: ##STR1## wherein R.sup.3 is a halogen atom or a lower alkyl group having 1-5 carbon atoms; l, m and n are numbers satisfying conditions of 0.01<n/(l+m).ltoreq.10 and 0.2<l/(l+m).ltoreq.1; and p is an integer of 0-4.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: March 28, 1989
    Assignee: Ube Industries, Ltd.
    Inventors: Nobuhiro Tsujimoto, Michinori Suzuki, Jiro Hiromoto
  • Process for the preparation of N-(hydroxyphenyl)malemide copolymer
    Patent number: 4740561
    Abstract: A process for the preparation of an N-(hydroxyphenyl)-5 maleimide copolymer having the following repeating units: ##STR1## wherein R.sup.1 is hydrogen, an aryl group, an alkyl group having 1-16 carbon atoms or a cycloalkyl group; R.sup.2 is hydrogen or a lower alkyl group having 1-5 carbon atoms; R.sup.3 is a halogen atom or a lower alkyl group having 1-5 carbon atoms; l, m and n are numbers satisfying conditions of 0.01<n/(l+m).ltoreq.10 and 0.1<l/(l+m).ltoreq.1; and p is an integer of 0-4, comprising reaction of a copolymer of maleic anhydride and an unsaturated hydrocarbon and an aminophenol in an organic solvent.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: April 26, 1988
    Assignee: UBE Industries, Ltd.
    Inventors: Nobuhiro Tsujimoto, Michinori Suzuki, Jiro Hiromoto