Patents by Inventor Steven M. Pratt

Steven M. Pratt 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).

  • Light redirecting film having surface nano-nodules
    Publication number: 20080081132
    Abstract: A light redirecting optical device comprises a polymeric film containing a light entry and a light exit surface and bearing on the light exit surface convex macrostructures that have a length, diameter, or other major dimension of at least 25 micrometers, wherein a major portion of the macrostructure surfaces is covered with nano-nodules having an average maximum cord length in a plane perpendicular to the direction of light travel of less than 1200 nm
    Type: Application
    Filed: March 30, 2006
    Publication date: April 3, 2008
    Inventors: Robert P. Bourdelais, Cheryl J. Brickey, Steven M. Pratt, Steven J. Neerbasch, Jehuda Greener
  • Patterned roller for the micro-replication of complex lenses
    Patent number: 6583936
    Abstract: Disclosed is a form comprising a surface having a morphology of complex lenses wherein the surface asperities have an amplitude of between 1 and 40 micrometers, a spatial frequency of between 1 and 100 complex lenses per square millimeter, and between 1 and 40 minor lenses per major lens. Also disclosed is a method for making such a form.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: June 24, 2003
    Assignee: Eastman Kodak Company
    Inventors: Cheryl J. Kaminsky, Robert P. Bourdelais, Steven M. Pratt, Daniel C. Lioy
  • System for measurement of peaks on surfaces
    Patent number: 5814722
    Abstract: A method of characterizing the roughness of a surface comprises counting peaks on a surface using a sensor by locating direction changes above a minimum and searches for the next direction change and where three changes are found of a valley, peak and another valley, one peak is counted. A signal qualifies as a peak if its short leg is above the normal threshold.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: September 29, 1998
    Assignee: Eastman Kodak Company
    Inventors: Steven M. Pratt, Edwin R. Olear