Patents by Inventor Karatholuvu N. Subramanian

Karatholuvu N. Subramanian 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).

  • Methods for producing lead-free in-situ composite solder alloys
    Patent number: 7771547
    Abstract: Methods are disclosed for producing in-situ composite solders having a particulate intermetallic phase homogeneously distributed throughout the solder matrix. An eutectic solder is mixed with the components of the intermetallic phase, melted and rapidly cooled to form the desired solder. In-situ composite solder alloys formed by the disclosed method provide greater solder joint strength and fatigue resistance.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: August 10, 2010
    Assignee: Board of Trustees Operating Michigan State University
    Inventors: Thomas R. Bieler, Karatholuvu N. Subramanian, Sunglak Choi
  • Composite metal matrix castings and solder compositions, and methods
    Patent number: 7572343
    Abstract: A composite composition and methods for making the composition, providing a metal matrix and dispersed inorganic oxide particles with a bound organofunctional group on a surface of the particles are described. A composite solder composition and methods for making and using the composition, providing a metal matrix and dispersed inorganic oxide particles with a bound organofunctional group on a surface of the particles are described. An apparatus comprising this composite solder composition is also described. In particular, organofunctional POSS, and POS, particles are described. The compositions provide cast metals and solders.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: August 11, 2009
    Assignee: Board of Trustees of Michigan State University
    Inventors: Andre Y. Lee, Karatholuvu N. Subramanian