Patents by Inventor Saman Chandana Nanayakkara

Saman Chandana Nanayakkara 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).

  • Seal comprising elastomeric composition with nanoparticles
    Patent number: 9169377
    Abstract: Seals and sealing members are formed from a composition generally comprising a first elastomeric material and a second elastomeric material, wherein the second elastomeric material comprises a dispersion of nanosized particles disposed within a polymer matrix of the second elastomeric material. Preferred first and second elastomeric materials are fluoroelastomers, and preferred nanosized particles are fluoropolymers. The nanosized particles are sized less than about 100 nm. The composition comprises about 0.2 to 65 percent by weight of first elastomeric material, about 20 to 95 percent by weight of second elastomeric material, and about 10 to 90 percent by weight particles based on the total weight of the particles and the second elastomeric material. The composition can be used to form annular O-ring seals placed within rotary cone bits used for drilling subterranean formations, and can be used to form a selected portion of the seal or the entire seal.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: October 27, 2015
    Assignee: Smith International, Inc.
    Inventor: Saman Chandana Nanayakkara
  • SEAL COMPRISING ELASTOMERIC COMPOSITION WITH NANOPARTICLES
    Publication number: 20100018778
    Abstract: Seals and sealing members are formed from a composition generally comprising a first elastomeric material and a second elastomeric material, wherein the second elastomeric material comprises a dispersion of nanosized particles disposed within a polymer matrix of the second elastomeric material. Preferred first and second elastomeric materials are fluoroelastomers, and preferred nanosized particles are fluoropolymers. The nanosized particles are sized less than about 100 nm. The composition comprises about 0.2 to 65 percent by weight of first elastomeric material, about 20 to 95 percent by weight of second elastomeric material, and about 10 to 90 percent by weight particles based on the total weight of the particles and the second elastomeric material. The composition can be used to form annular O-ring seals placed within rotary cone bits used for drilling subterranean formations, and can be used to form a selected portion of the seal or the entire seal.
    Type: Application
    Filed: July 23, 2008
    Publication date: January 28, 2010
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Saman Chandana Nanayakkara