Patents by Inventor Todd A. Ballen

Todd A. Ballen 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).

  • Beaded rear projection screen with tunable gain
    Publication number: 20030053207
    Abstract: The present invention provides a beaded rear projection screen that has performance properties such as gain and viewing angle that can be tuned by using a mixture of two or more types of microbeads having different refractive indices and varying the mixture. The present invention further provides methods of selecting microbeads and the construction of the screen so that transmission through the screen can remain sufficiently high throughout the range of tunability.
    Type: Application
    Filed: September 4, 2001
    Publication date: March 20, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Todd A. Ballen, Robert S. Moshrefzadeh
  • Selective deposition of material on a substrate according to an interference pattern
    Publication number: 20010028925
    Abstract: A method of preferentially depositing material on a substrate is disclosed. Material can be preferentially deposited by directing an electromagnetic interference pattern on to a substrate to selectively heat areas of the substrate coincident with the interference pattern maxima. The substrate can then be exposed to gas phase material that is capable of preferentially accumulating on surfaces based on surface temperature.
    Type: Application
    Filed: March 28, 2001
    Publication date: October 11, 2001
    Applicant: 3M Innovative Properties Company
    Inventors: Robert S. Moshrefzadeh, Todd A. Ballen