Patents by Inventor Raymond R. Wong

Raymond R. Wong 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).

  • Pigment ink jet compositions for high resolution printing
    Patent number: 6328393
    Abstract: An aqueous ink jet ink composition having a pigment wherein at least 50% of the pigment particles have an average diameter or size≦0.3 microns with the remaining particles in the ink composition having a diameter or size≦3.0 microns, water, a dispersant which is a reaction product of an aldehyde and a naphthalene sulfonate salt, and/or a sulfone solvent. The aqueous ink jet ink possesses a latency of at least 10 seconds at a relative humidity of 15% in either a high resolution (>360 spi) printhead or full-width array printhead having at least one nozzle opening of a diameter or size ranging from 10 to about 49 microns.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: December 11, 2001
    Assignee: Xerox Corporation
    Inventors: John Wei-Ping Lin, Gary R. Fague, Raymond R. Wong
  • Pigment ink jet ink compositions for high resolution printing
    Patent number: 6143807
    Abstract: An aqueous ink jet ink composition having a pigment wherein at least 50% of the pigment particles have an average diameter or size .ltoreq.0.3 microns with the remaining particles in the ink composition having a diameter or size .ltoreq.3.0 microns, water, a dispersant which is a reaction product of an aldehyde and a naphthalene sulfonate salt, and/or a sulfone solvent. The aqueous ink jet ink possesses a latency of at least 10 seconds at a relative humidity of 15% in either a high resolution (>360 spi) printhead or full-width array printhead having at least one nozzle opening of a diameter or size ranging from 10 to about 49 microns.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: November 7, 2000
    Assignee: Xerox Corporation
    Inventors: John Wei-Ping Lin, Gary R. Fague, Raymond R. Wong