Patents by Inventor Ravi Ram Vedula

Ravi Ram Vedula 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).

  • Heat resistant high moisture vapor transmission thermoplastic polyurethane
    Patent number: 7202322
    Abstract: A thermoplastic polyether polyurethane having high moisture vapor transmission, high melting point and static dissipative properties is disclosed. The thermoplastic polyether polyurethane is prepared by reacting a hydroxyl terminated polyether intermediate, an aromatic chain extender glycol, and a polyisocyanate. The polymers formed are useful for melt-spun fibers, fabric coatings for breathable garments, house wrap, roofing membranes, and other applications requiring high vapor transmission and high melting points.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: April 10, 2007
    Assignee: Noveon, Inc.
    Inventors: Ravi Ram Vedula, Kimberly Lynn Young
  • Polyurethane elastomeric fiber and process for making the fiber
    Patent number: 6911502
    Abstract: This invention is comprised of a thermoplastic polyurethane elastomer fiber obtained by melt spinning a polyurethane having a rebound of 60% or greater and a isocyanate-terminated polyether or polyester additive. The elastic fibers have low shrinkage, high heat resistance, low tensile set, and high elongation.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: June 28, 2005
    Assignee: Noveon IP Holdings Corp.
    Inventor: Ravi Ram Vedula
  • Heat resistant high moisture vapor transmission thermoplastic polyurethane
    Publication number: 20040092696
    Abstract: A thermoplastic polyether polyurethane having high moisture vapor transmission, high melting point and static dissipative properties is disclosed. The thermoplastic polyether polyurethane is prepared by reacting a hydroxyl terminated polyether intermediate, an aromatic chain extender glycol, and a polyisocyanate. The polymers formed are useful for melt-spun fibers, fabric coatings for breathable garments, house wrap, roofing membranes, and other applications requiring high vapor transmission and high melting points.
    Type: Application
    Filed: October 27, 2003
    Publication date: May 13, 2004
    Inventors: Ravi Ram Vedula, Kimberly Lynn Young
  • Polyurethane elastomeric fiber and process for making the fiber
    Publication number: 20020161159
    Abstract: This invention is comprised of a thermoplastic polyurethane elastomer fiber obtained by melt spinning a polyurethane having a rebound of 60% or greater and a isocyanate-terminated polyether or polyester additive. The elastic fibers have low shrinkage, high heat resistance, low tensile set, and high elongation.
    Type: Application
    Filed: February 23, 2001
    Publication date: October 31, 2002
    Inventor: Ravi Ram Vedula
  • Thermoplastic polyether urethane
    Patent number: 5959059
    Abstract: A thermoplastic polyether polyurethane having good rebound resilience and low hysteresis properties is prepared by the reaction of a diisocyanate with a hydroxyl terminated polyether having a weight average molecular weight of at least 1,400 and a glycol chain extender. The polyether contains alkylene oxide repeat units having from 2 to 6 carbon atoms and the chain extender glycol has from 2 to 16 carbon atoms. The amount of the chain extender glycol is from about 0.25 to about 2 moles per mole of the polyether.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: September 28, 1999
    Assignee: The B.F. Goodrich Company
    Inventors: Ravi Ram Vedula, Stanley Raymond Goscewski