Patents by Inventor Raju U. Datla

Raju U. Datla 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).

  • Infrared neutral-density filter having copper alloy film
    Patent number: 5726797
    Abstract: A neutral-density optical filter has a dielectric substrate and a film costing essentially of copper and nickel. The film is preferably formed of Constantan, which is 55% copper and 45% nickel. The filter achieves a high optical density with a low spectral variation.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: March 10, 1998
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Zhuomin M. Zhang, Raju U. Datla, Leonard M. Hanssen