Patents by Inventor Pradeep P. Phule

Pradeep P. Phule 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).

  • Magnetorheological fluids and related method of preparation
    Patent number: 6712990
    Abstract: Magnetorheological (MR) fluids, dispersions of magnetically soft particles in fluids (gases, liquids, or semi-solids such as greases), are disclosed. The present invention uses the initial steps of a sol-gel process to assist in preparation of MR fluids that have significantly enhanced stability and redispersibility, without the use of ceramic particles such as silica or bridging polymers such as PVP.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: March 30, 2004
    Assignee: University of Pittsburgh of the Commonwealth System of Higher Education
    Inventor: Pradeep P. Phule
  • Magnetorheological fluid
    Patent number: 5985168
    Abstract: A magnetorheological (MR) fluid including magnetically soft particles suspended in a carrier solvent is disclosed. The MR fluid also includes additive particles of smaller size than the magnetically soft particles and a bridging polymer. The additive particles and polymer form a gel-like material which provides a blanket or coating around the magnetically soft particles. The MR fluids possess improved stability and redispersibility, as well as favorable mechanical properties.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: November 16, 1999
    Assignee: University of Pittsburgh of the Commonwealth System of Higher Education
    Inventor: Pradeep P. Phule
  • Low temperature preparation of ultrafine oxide particles using organized reaction media
    Patent number: 5133955
    Abstract: The present invention relates to a method for the preparation of ultrafine oxide particles using organized reaction media. Integrated circuit (IC) densities have necessitated the use of ultrahigh purity process fluids in state of the art fabrication facilities. It is the purpose of the present invention to synthesize monodispersed submicron particles of some representative contaminants, such as ultrafine oxide particles, using organized reaction media, and study their characteristics in relation to their removal from process fluids.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: July 28, 1992
    Assignee: Arizona Technology Development Corporation
    Inventors: Srini Raghavan, Subhash H. Risbud, Pradeep P. Phule