Patents by Inventor Kinya Sonoda

Kinya Sonoda 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).

  • Toner for elastrostatic latent image developing and method of manufacturing same
    Patent number: 5863692
    Abstract: The present invention relates to a toner comprising toner particles which include at least a colorant, a binder resin, particles of metal oxide having a BET specific surface area of 80.about.300 m.sup.2 /g, and an organic boron compound represented by the structural formal (I) below. ##STR1## (Where Z is a residue forming a ring with an adjacent oxygen atom and carbon atom, X is a cation, and n is an integer of either 1 or 2.) The present invention further relates to a method of manufacturing a toner comprising a process of mixing at least a colorant, a binder resin, particles of metal oxide having a BET specific surface area of 80.about.300 m.sup.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: January 26, 1999
    Assignee: Minolta Co., Ltd.
    Inventors: Akihiro Nakamura, Katsuji Nagasawa, Yutaka Tsujishita, Kinya Sonoda