Patents by Inventor Robert Janules

Robert Janules 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 containing resin prepared by a combination of emulsion followed by suspension polymerization
    Patent number: 6258504
    Abstract: A method for preparing thermoplastic toner resins is disclosed and the toner resins produced by said method. More particularly, an emulsion polymerized resin, constituting a high molecular weight component, is used as a seed for subsequent suspension polymerization of a lower molecular weight component. The emulsion micelles are swelled with monomers and subsequent suspension polymerization produces particles where the high and low molecular weight components are interpenetrated to form a resin with a bimodal distribution of molecular weight. A toner composition is made using the resin as the main component. The resin particle has a first resin portion having a particle size in the range of about 50 to about 200 nm. and a number average molecular weight in the range of about 104 to about 107, and a second resin portion formed around the first resin portion with a number average molecular weight lower than that of said first resin portion, the resin having a polydispersity in the range of 5 to 50.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: July 10, 2001
    Assignee: Nashua Corporation
    Inventors: Jan Bartus, Robert Janules, James Boswell, Jeffrey Clark