Patents by Inventor Donna Anne DiPrima

Donna Anne DiPrima 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).

  • Hard carrier particles coated with a polymer resin and a conductive material
    Patent number: 6627370
    Abstract: There is provided a carrier, for an electrcostatographic developer, comprising particles of a hard magnetic ferrite material as the core, the core having a coating of a polymer resin, said resin in turn having a coating of an organic conductive material. The organic conductive material can be a charge control agent and can be present in very small amounts. The developer compositions have no need for preconditioning since they have stable charging characteristics. Further, they exhibit low levels of “dusting”.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: September 30, 2003
    Assignee: NexPress Solutions LLC
    Inventors: Dinesh Tyagi, Donna Anne DiPrima, James Hunter Anderson
  • Method and apparatus for controlling gloss for toner images
    Patent number: 5716750
    Abstract: This invention provides a method and an apparatus of imparting various gloss levels to toner images. The method comprises the steps of:fixing toner to a receiver in a fixing system, wherein said fixed toner possesses residual stress; andpost-treating said fixed toner to at least partially relax said residual stress of said fixed toner.This invention also provides a fixing apparatus comprising:a fixing system for fixing toner to a receiver wherein said fixed toner possesses residual stress; and a post-treatment element capable of at least partially relaxing said residual stress of said fixed toner.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: February 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Muhammed Aslam, Donna Anne DiPrima, Robert Edward Zeman