Patents by Inventor Rajendra K. Amin

Rajendra K. Amin 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).

  • Method of manufacturing an article of non-magnetic austenitic alloy steel for a drill collar
    Patent number: 4514236
    Abstract: A non-magnetic austenitic alloy steel capable of producing the magnetic properties required in items such as Drill Collars in the as-rolled or as-rolled and direct quenched condition.The steel composition includes by weight up to 0.5% carbon from 10 to 25% manganese, up to 20% chromium, not less than 0.2% nitrogen and from 0.2% nitrogen and from 0.2 to 2.0% vanadium.
    Type: Grant
    Filed: March 1, 1983
    Date of Patent: April 30, 1985
    Assignee: British Steel Corporation
    Inventors: William T. Cook, Michael Cristinacce, Rajendra K. Amin