Patents by Inventor Francis L. Chupka, Jr.

Francis L. Chupka, Jr. 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).

  • Process for making bimodul, cross-linked toner resin
    Patent number: 5856407
    Abstract: A bimodal, crosslinked toner resin can be prepared in non-aqueous solvent, e.g., toluene, using standard solution polymerization techniques. The resin-forming process prepares a precursor resin from ethylenically unsaturated monomer(s), and then grafts maleic anhydride onto the precursor resin to form a modified precursor resin. The modified precursor resin is reacted with a polyfunctional molecule, e.g. a diol, to provide a crosslinked resin. The process is preferably conducted in the presence of a low molecular weight polymeric additive, e.g., polystyrene, to provide a bimodal as well as crosslinked toner resin composition. With the addition of a colorant, a toner powder may be formed.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: January 5, 1999
    Assignee: Image Polymers Company
    Inventor: Francis L. Chupka, Jr.
  • Bimodal, crosslinked toner resin and process for making same
    Patent number: 5684090
    Abstract: A bimodal, crosslinked toner resin can be prepared in non-aqueous solvent, e.g., toluene, using standard solution polymerization techniques. The resin-forming process prepares a precursor resin from ethylenically unsaturated monomer(s), and then grafts maleic anhydride onto the precursor resin to form a modified precursor resin. The modified precursor resin is reacted with a polyfunctional molecule, e.g. a diol, to provide a crosslinked resin. The process is preferably conducted in the presence of a low molecular weight polymeric additive, e.g., polystyrene, to provide a bimodal as well as crosslinked toner resin composition. With the addition of a colorant, a toner powder may be formed.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: November 4, 1997
    Assignee: Image Polymers Company
    Inventor: Francis L. Chupka, Jr.