Patents by Inventor Michael J. Petrich

Michael J. Petrich 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).

  • Protective overlay bearing a graphic and retroreflective articles comprising the overlay
    Patent number: 8506095
    Abstract: A transfer article, a retroreflective article and methods of making the same. The transfer article can include an overlay. The retroreflective article can include an optical layer and an overlay. The optical layer can include a front surface and a rear surface, and can include retroreflective optical elements. The overlay can include a front surface and a rear surface adapted to be coupled to the front surface of a substrate, such as the optical layer. The overlay can further include a graphic, such that the graphic is buried with respect to the front surface of the overlay. A method of making the retroreflective article can include applying a graphic to the rear surface of the overlay, and coupling the overlay bearing the graphic to the front surface of a substrate, such as the optical layer.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: August 13, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Chester A. Bacon, Jr., Bradley R. Ray, Stewart H. Corn, Timothy S. Skogland, Thomas G. Cheesebrow, Michael J. Petrich
  • PROTECTIVE OVERLAY BEARING A GRAPHIC AND RETROREFLECTIVE ARTICLES COMPRISING THE OVERLAY
    Publication number: 20110228391
    Abstract: A transfer article, a retroreflective article and methods of making the same. The transfer article can include an overlay. The retroreflective article can include an optical layer and an overlay. The optical layer can include a front surface and a rear surface, and can include retroreflective optical elements. The overlay can include a front surface and a rear surface adapted to be coupled to the front surface of a substrate, such as the optical layer. The overlay can further include a graphic, such that the graphic is buried with respect to the front surface of the overlay. A method of making the retroreflective article can include applying a graphic to the rear surface of the overlay, and coupling the overlay bearing the graphic to the front surface of a substrate, such as the optical layer.
    Type: Application
    Filed: November 20, 2009
    Publication date: September 22, 2011
    Inventors: Chester A. Bacon, JR., Bradley R. Ray, Stewart H. Corn, Timothy S. Skogland, Thomas G. Cheesebrow, Michael J. Petrich
  • Toner developed electrostatic imaging process for outdoor signs
    Patent number: 5262259
    Abstract: An electrographic imaging process is described in which electrostatic images are toned in sequence to form a multicolor intermediate image on a temporary dielectric receptor. The intermediate image is then transferred to a permanent receptor. Certain relative properties of the toner and the intermediate image, such as surface energy, T.sub.g, work of adhesion, and complex dynamic viscosity, have been found to be important to the production of good final images.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: November 16, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Hsin-hsin Chou, John F. Eisele, Gaye K. Lehman, Wu-Shyong Li, Valdis Mikelsons, Michael J. Petrich, Prabhakara S. Rao, Thomas J. Staiger, Paul J. Wang, Gregory L. Zwaldo, Michael G. Baier, Richard H. Olson
  • Image transfer apparatus and method
    Patent number: 5114520
    Abstract: A method and apparatus for the transfer of images from a donor surface to a receptor utilizing heated pressure rolls to cause transfer to the image materials to the receptor.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: May 19, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Paul J. Wang, Jr., Michael J. Petrich, Francis A. Wadzinski, James E. Guither