Patents by Inventor Rajat Darshan Agrawal

Rajat Darshan Agrawal 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).

  • Methods for removing contaminants from polymers
    Patent number: 6369192
    Abstract: The present invention relates to a method for treating plastic polymers to reduce or remove organic contaminants. More particularly, the present invention relates to a method of treating, by continuous means, a flowable polymer mass with a solvating fluid in an environment at which the solvating fluid is in a supercritical state and is subject to conditions sufficient to preferentially solvate and extract organic, and especially non-volatile, contaminants from the polymer mass.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: April 9, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Louise Anne Dufresne, Rajat Darshan Agrawal