Patents by Inventor Juro Aoyagi

Juro Aoyagi 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 using macroamine polymers as flocculating agents
    Patent number: 3969239
    Abstract: A method for using a macroamine polymer as a flocculating agent, said polymer having a structural unit shown by the following formula: ##EQU1## wherein R represents an alkyl group containing 1 to 4 carbon atoms, x is a mol decimal fraction between about 0.65 and 0.95, and y is a mol decimal fraction between about 0.23 and 0.04. Said polymer can be obtained by reacting polyvinyl bromide with an N-monoalkylaniline having 1 to 4 carbon atoms in the alkyl group.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: July 13, 1976
    Assignee: B. R. Chemical Co., Ltd.
    Inventors: Isao Shinohara, Juro Aoyagi
  • Water soluble linear macroamine polymers and method of producing them
    Patent number: 3933717
    Abstract: A novel macroamine polymer particularly useful as a flocculating agent, said polymer having a structural unit shown by the following formula: ##EQU1## wherein R represents an alkyl group containing 1 to 4 carbon atoms, x is a mol decimal fraction between about 0.65 and 0.95, and y is a mol decimal fraction between about 0.23 and 0.04. Said polymer can be obtained by reacting polyvinyl bromide with an N-monoalkylaniline having 1 to 4 carbon atoms in the alkyl group.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: January 20, 1976
    Assignee: B. R. Chemical Co., Ltd.
    Inventors: Isao Shinohara, Juro Aoyagi