Patents by Inventor Biswaroop Majumdar

Biswaroop Majumdar 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).

  • Method for making an optical film
    Patent number: 5783120
    Abstract: An optical film is provided which includes a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: July 21, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Andrew J. Ouderkirk, Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar