Patents by Inventor Subir Roychoudbury

Subir Roychoudbury 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).

  • Oxygen storage system
    Patent number: 5866078
    Abstract: This invention which combines an oxygen storage system with a catalytic converter to enhance the conversion of common pollutants found in the exhaust gas stream of an internal combustion engine. The oxygen storage element is placed upstream of the catalytic converter and is designed to extract excess oxygen from the exhaust gas stream and release the extracted oxygen when the exhaust gas stream is oxygen deficient. Controlling the oxygen level in this manner allows for effectiveness of the converter to be increased.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: February 2, 1999
    Assignee: Precision Combustion, Inc.
    Inventors: William C. Pfefferle, Subir Roychoudbury