Patents Represented by Attorney, Agent or Law Firm Eugene O. Palazzo, Esq.
  • Patent number: 6815136
    Abstract: A process including: dispersing a first liquid developer concentrate comprising a resin, a colorant, and a liquid developer reconstitution compound, in a carrier liquid, into additional carrier liquid to form a second liquid developer; depositing the second liquid developer onto a liquid receiver member to form a developer cake; developing an image with the developer cake; reclaiming undeveloped developer cake from the cake bearing liquid receiver member; and redispersing the reclaimed undeveloped developer cake in the second developer liquid.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: November 9, 2004
    Assignee: Xerox Corporation
    Inventors: Weizhong Zhao, Thomas W. Smith, David H. Pan, William M. Prest, Jr., Samuel Kaplan
  • Patent number: 6811896
    Abstract: An organic light emitting device (OLED) has a thick (100 to 250 nanometers) porphyrin buffer layer between the anode and the luminescent region. The thick porphyrin buffer layer in the OLED results in a small increase in device operating voltage, reduces the possibility of OLED shorting and can improve color purity in blue emitting OLEDs due to its significant optical absorption in the red range.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: November 2, 2004
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Zoran D. Popovic, Nan-Xing Hu, Ah-Mee Hor
  • Patent number: 6294606
    Abstract: A latex used for the preparation of toner particles by emulsion aggregation is prepared, using a controlled addition of anionic surfactants, without the use of a nonionic surfactant. Such a process comprises preparing an aqueous phase using a limited amount of anionic surfactant; preparing an emulsion of monomers in water with additional anionic surfactant and without a nonionic surfactant; adding a portion of the emulsion to the aqueous phase to initiate seed polymerization, in the presence of an initiator, to form seed polymer; and adding the remaining monomer emulsion to the composition to complete polymerization to form a latex polymer.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: September 25, 2001
    Assignee: Xerox Corporation
    Inventors: Allan K. Chen, Chieh-Min Cheng, Tie Hwee Ng, George Liebermann