Patents by Inventor Kuldip Chopra

Kuldip Chopra 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).

  • Manganese sulfide composition and its method of production
    Patent number: 5768678
    Abstract: Disclosed is a metal sulfide composition for use as a machining aid comprising 55.0% to 65.0% by weight of manganese, 29.0% to 36.0% by weight of sulfur, and greater than 2.0% to 10% by weight of iron. Also disclosed is a method of making the metal sulfide composition comprising mixing manganese, sulfur, and iron; initiating an exothermic reaction between the manganese and sulfur, wherein the iron component moderates and cools the exothermic reaction; forming a solid mass of manganese sulfide composition containing a portion of the iron suspended therein; and recovering the solid manganese sulfide composition. A method of using the manganese sulfide composition according to the present invention as a machining aid comprises mixing into a blend a desired metal powder with the manganese sulfide composition; spreading the blend into a metal part die; compacting the blend into the die; sintering the compacted part; and machining the sintered part.
    Type: Grant
    Filed: May 8, 1996
    Date of Patent: June 16, 1998
    Assignee: Pyron Corporation
    Inventors: Kuldip Chopra, Stephen F. Claeys, G. Russell Lewis, Ralph A. Casciani