Patents by Inventor Proserfina C. Rey

Proserfina C. Rey 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).

  • Composite cemented carbide
    Patent number: 5593474
    Abstract: A composite material is disclosed along with the method of making the same. The material comprises a tough grade of cemented carbide granule dispersed with a hard brittle grade of cemented carbide granules to form a matrix. The quantity of hard, brittle cemented carbide granules is between 20% to 60% of the total composition. Such material functions to improve wear resistance without sacrificing toughness.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: January 14, 1997
    Assignee: Smith International, Inc.
    Inventors: Madapusi K. Keshavan, Proserfina C. Rey
  • Hard facing
    Patent number: 5051112
    Abstract: A hard facing rod is made by mixing particles of tungsten carbide, particles of a metal binder, and a temporary organic binder. The mixture is pressed, preferably by extrusion, into the form of a rod. The organic binder is removed and the rod is heated to a sufficient temperature to sinter the metal particles together without melting so that the rod has a residual porosity in the range of from 5 to 20%. Such a rod is used for hard facing a metal surface in lieu of conventional tube-rods. The technique permits a high proportion of tungsten carbide relative to the metal matrix and provides uniform distribution of carbide particles in the hard facing.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: September 24, 1991
    Assignee: Smith International, Inc.
    Inventors: Madapusi K. Keshavan, Proserfina C. Rey
  • Composite cemented carbide
    Patent number: 4966627
    Abstract: A composite material is disclosed along with the method of making the same. The material comprises a tough grade of cemented carbide granule dispersed with a hard brittle grade of cemented carbide granules to form a matrix. The quantity of hard, brittle cemented carbide granules is between 20% to 60% of the total composition. Such material functions to improve wear resistance without sacrificing toughness.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: October 30, 1990
    Assignee: Smith International, Inc.
    Inventors: Madapusi K. Keshavan, Proserfina C. Rey