Patents by Inventor Wakio Nagashima

Wakio Nagashima 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).

  • Liquid developer for electrophotography
    Patent number: 4033890
    Abstract: Novel liquid developers contain in a carrier liquid a toner produced by graft-copolymerization of an addition-polymerizable monomer represented by the formula: ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group and R.sub.2 represents an alkyl group having 6 to 20 carbon atoms, an addition-polymerizable monomer having an alkoxysilane group or a phenoxysilane group, and carbon black. The carrier liquid has a high electric resistance and a low dielectric constant.
    Type: Grant
    Filed: February 26, 1975
    Date of Patent: July 5, 1977
    Assignees: Fuji Photo Film Co., Ltd., Mitsubishi Gas Chemical Company, Inc.
    Inventors: Yasuo Tamai, Satoru Honjo, Sadao Osawa, Masato Satomura, Chiaki Osada, Wakio Nagashima, Naomitsu Takashina