Patents by Inventor Kul B. Bhasin

Kul B. Bhasin 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).

  • Monolithic MM-wave phase shifter using optically activated superconducting switches
    Patent number: 5116807
    Abstract: A phase shifter having a reference path and a delay path, light sources, and superconductive switches. Each of the superconductive switches is terminated in a virtual short circuit, which may be a radial stub. Switching between the reference path and delayed path is accomplished by illuminating the superconductive switches connected to the desired path, while not illuminating the superconductive switches connected to the other path.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: May 26, 1992
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Robert R. Romanofsky, Kul B. Bhasin
  • Method for end point detection during plasma etching
    Patent number: 4198261
    Abstract: A method and apparatus for detecting the end point of a plasma etching process comprising the use of an optical technique in which light is beamed on the layer to be etched and the resulting beam that is reflected and refracted is detected. Sharply different values of light intensity can be detected when the desired layer is etched and the next layer receives the light beam. A laser is preferably used to obtain an intense and substantially uniform frequency light source.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: April 15, 1980
    Assignee: Gould Inc.
    Inventors: Heinz H. Busta, Robert E. Lajos, Kul B. Bhasin