Patents by Inventor Joseph M. Kropac

Joseph M. Kropac 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).

  • Electrosensitive recording paper having improved recording density
    Patent number: 4403232
    Abstract: An electrosensitive recording member having a base support, conductive polyester layer on the base support, and a contrasting surface recording layer is disclosed. Improved recording density is achieved by incorporating a divalent metal salt of organic acid containing up to 13 carbon atoms into the conductive polyester layer.
    Type: Grant
    Filed: February 3, 1982
    Date of Patent: September 6, 1983
    Assignee: Exxon Research and Engineering Co.
    Inventor: Joseph M. Kropac
  • Method of making a thermo active imaging member
    Patent number: 4108655
    Abstract: A manifold imaging method and member is disclosed wherein the imaging layer is activated by a fused thermo-activator which is incorporated into the member by dispersion coating means. Upon heating, the thermo-activator activates the imaging layer for use in the manifold imaging process.
    Type: Grant
    Filed: February 25, 1974
    Date of Patent: August 22, 1978
    Assignee: Xerox Corporation
    Inventor: Joseph M. Kropac
  • Manifold imaging member and process employing a dark charge injecting layer
    Patent number: 3964904
    Abstract: A manifold member and method is disclosed wherein the imaging layer is activated by a thermo-activator which is incorporated integrally into the manifold imaging layer. The member also contains a dark charge injecting material. Upon heating, the thermo-activator activates the imaging layer for use in the manifold imaging process.
    Type: Grant
    Filed: August 22, 1974
    Date of Patent: June 22, 1976
    Assignee: Xerox Corporation
    Inventor: Joseph M. Kropac
  • Manifold imaging member and process employing a metal soap
    Patent number: 3955975
    Abstract: A manifold imaging method and member is disclosed wherein the imaging layer comprises electrically photosensitive materials, a binder and a metallic soap. Such imaging layers have been found to be more easily activated or rendered structurally fracturable in response to the combined effects of an applied electric field and exposure to electromagnetic radiation to which the imaging layer is sensitive when employed in the manifold imaging process.
    Type: Grant
    Filed: March 28, 1974
    Date of Patent: May 11, 1976
    Assignee: Xerox Corporation
    Inventor: Joseph M. Kropac