Patents by Inventor Kofi Opare Diggs

Kofi Opare Diggs 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).

  • Chemically prepared toner formulation including a borax coupling agent
    Patent number: 9023569
    Abstract: A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a colorant and a release agent; a shell that is formed around the core and includes a second polymer binder; and a borax coupling agent between the core and the shell.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: May 5, 2015
    Assignee: Lexmark International, Inc.
    Inventors: Jing X. Sun, Kofi Opare Diggs
  • Process for preparing toner including a borax coupling agent
    Patent number: 8669035
    Abstract: A method for producing toner according to one example embodiment includes combining and agglomerating a first polymer emulsion with a colorant dispersion and a release agent dispersion to form toner cores. A borax coupling agent is added to the toner cores. A second polymer emulsion is combined and agglomerated with the toner cores having the borax coupling agent to form toner shells around the toner cores. The aggregated toner cores and toner shells are fused to form toner particles.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: March 11, 2014
    Assignee: Lexmark International, Inc.
    Inventors: Jing X. Sun, Kofi Opare Diggs
  • PROCESS FOR PREPARING TONER INCLUDING A BORAX COUPLING AGENT
    Publication number: 20130171551
    Abstract: A method for producing toner according to one example embodiment includes combining and agglomerating a first polymer emulsion with a colorant dispersion and a release agent dispersion to form toner cores. A borax coupling agent is added to the toner cores. A second polymer emulsion is combined and agglomerated with the toner cores having the borax coupling agent to form toner shells around the toner cores. The aggregated toner cores and toner shells are fused to form toner particles.
    Type: Application
    Filed: December 29, 2011
    Publication date: July 4, 2013
    Inventors: Jing X. Sun, Kofi Opare Diggs
  • CHEMICALLY PREPARED TONER FORMULATION INCLUDING A BORAX COUPLING AGENT
    Publication number: 20130171553
    Abstract: A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a colorant and a release agent; a shell that is formed around the core and includes a second polymer binder; and a borax coupling agent between the core and the shell.
    Type: Application
    Filed: December 29, 2011
    Publication date: July 4, 2013
    Inventors: JING X. SUN, Kofi Opare Diggs