Patents by Inventor Nobuaki Minamii

Nobuaki Minamii 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).

  • Unsymmetrical azonitriles
    Patent number: 4039527
    Abstract: Unsymmetrical azonitriles of the formula, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently straight- or branched-chain alkyl having 1 to 7 carbon atoms or alkoxy substituted straight- or branched-chain alkyl having 2 to 11 carbon atoms but at least one of R.sup.1 and R.sup.2 and at least one of R.sup.3 and R.sup.4 must be different, have good efficiency as initiator for polymerizations or copolymerizations of vinyl monomers. These unsymmetrical azonitriles can be prepared by oxidizing a corresponding unsymmetrical hydrazo compound.
    Type: Grant
    Filed: October 10, 1974
    Date of Patent: August 2, 1977
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Joji Nagaoka, Kazuhiko Yamashita, Nobuaki Minamii, Tsutomu Miyagawa, Masahiko Sugano