Patents by Inventor Nareshchrandra J. Kar

Nareshchrandra J. Kar 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).

  • Copper-based spinodal alloy bearings
    Patent number: 4641976
    Abstract: This invention relates to the use of spinodal alloys consisting essentially of copper-nickel-tin for bearing surfaces formed between roller cutter cones of sealed bearing rock bits.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: February 10, 1987
    Assignee: Smith International, Inc.
    Inventor: Nareshchrandra J. Kar