Patents by Inventor V. R. Parthasarathy

V. R. Parthasarathy 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).

  • Two stage process for the oxygen delignification of lignocellulosic fibers with peroxide reinforcement in the first stage
    Patent number: 5011572
    Abstract: A process is provided for a two-stage oxygen delignification of chemical pulp in which 0.01% to 1% hydrogen peroxide is incorporated into the first and, optionally the second stage. The invention is particularly suitable when the pulp is subsequently bleached with at least one chlorine dioxide stage and at least one hydrogen peroxide stage.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: April 30, 1991
    Assignees: FMC Corporation, North Carolina State University
    Inventors: V. R. Parthasarathy, Meenaksi Sundaram, Hasan Jameel, Josef S. Gratzl, Ronald J. Klein