Patents by Inventor Rachana D. Upadhyay

Rachana D. Upadhyay 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).

  • Patent number: 8771390
    Abstract: A vitrified superabrasive product includes a superabrasive component and a vitrified bond component in which the superabrasive component is dispersed, wherein the vitrified bond component defines pores occupying greater than about 50% of the total volume of the vitrified superabrasive product. The vitrified superabrasive product can be in the form of a grinding tool, such as a grinding wheel. A superabrasive mixture includes a glass powder, a superabrasive grit, a binder and a silicon carbide. The mixture can be in the form of a green body, which is fired under an atmosphere and pressure, and at a temperature sufficient to form a porous vitrified superabrasive product.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: July 8, 2014
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Rachana D. Upadhyay, Gilles Querel, Pradyumna Gupta, Richard W. J. Hall
  • Publication number: 20130008091
    Abstract: A vitrified superabrasive product includes a superabrasive component and a vitrified bond component in which the superabrasive component is dispersed, wherein the vitrified bond component defines pores occupying greater than about 50% of the total volume of the vitrified superabrasive product. The vitrified superabrasive product can be in the form of a grinding tool, such as a grinding wheel. A superabrasive mixture includes a glass powder, a superabrasive grit, a binder and a silicon carbide. The mixture can be in the form of a green body, which is fired under an atmosphere and pressure, and at a temperature sufficient to form a porous vitrified superabrasive product.
    Type: Application
    Filed: July 9, 2012
    Publication date: January 10, 2013
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Rachana D. Upadhyay, Gilles Querel, Pradyumna Gupta, Richard W. J. Hall
  • Patent number: 8216325
    Abstract: A superabrasive product, such as a superabrasive tool, includes a superabrasive grain component and a porous continuous phase that includes a thermoplastic polymer component in which the superabrasive grain component is distributed. A superabrasive product precursor to the superabrasive product includes a superabrasive grain component, a bond component and a polymer blowing agent of encapsulated gas. A method of forming a superabrasive product includes combining a superabrasive, a bond component and a polymer blowing agent of encapsulated gas to form, for example, a superabrasive product precursor. The combined superabrasive, bond component and polymer blowing agent of encapsulated gas are heated to a temperature and for a period of time that causes release of at least a portion of the gas from encapsulation within the blowing agent.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 10, 2012
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventor: Rachana D. Upadhyay
  • Patent number: 8216326
    Abstract: A vitrified superabrasive product includes a superabrasive component and a vitrified bond component in which the superabrasive component is dispersed, wherein the vitrified bond component defines pores occupying greater than about 50% of the total volume of the vitrified superabrasive product. The vitrified superabrasive product can be in the form of a grinding tool, such as a grinding wheel. A superabrasive mixture includes a glass powder, a superabrasive grit, a binder and a silicon carbide. The mixture can be in the form of a green body, which is fired under an atmosphere and pressure, and at a temperature sufficient to form a porous vitrified superabrasive product.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 10, 2012
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Rachana D. Upadhyay, Gilles Querel, Pradyumna Gupta, Richard W. J. Hall
  • Publication number: 20100018126
    Abstract: A superabrasive product, such as a superabrasive tool, includes a superabrasive grain component and a porous continuous phase that includes a thermoplastic polymer component in which the superabrasive grain component is distributed. A superabrasive product precursor to the superabrasive product includes a superabrasive grain component, a bond component and a polymer blowing agent of encapsulated gas. A method of forming a superabrasive product includes combining a superabrasive, a bond component and a polymer blowing agent of encapsulated gas to form, for example, a superabrasive product precursor. The combined superabrasive, bond component and polymer blowing agent of encapsulated gas are heated to a temperature and for a period of time that causes release of at least a portion of the gas from encapsulation within the blowing agent.
    Type: Application
    Filed: May 7, 2009
    Publication date: January 28, 2010
    Inventor: Rachana D. Upadhyay
  • Publication number: 20090313906
    Abstract: A vitrified superabrasive product includes a superabrasive component and a vitrified bond component in which the superabrasive component is dispersed, wherein the vitrified bond component defines pores occupying greater than about 50% of the total volume of the vitrified superabrasive product. The vitrified superabrasive product can be in the form of a grinding tool, such as a grinding wheel. A superabrasive mixture includes a glass powder, a superabrasive grit, a binder and a silicon carbide. The mixture can be in the form of a green body, which is fired under an atmosphere and pressure, and at a temperature sufficient to form a porous vitrified superabrasive product.
    Type: Application
    Filed: May 7, 2009
    Publication date: December 24, 2009
    Inventors: Rachana D. Upadhyay, Gilles Querel, Pradyumna Gupta, Richard W.J. Hall
  • Publication number: 20090151267
    Abstract: Abrasive tools and techniques are disclosed that can cut hard, brittle materials to relatively precise dimensions. The tools, which can include a hybrid bond of metal or metal alloy and a resin matrix together with fine abrasive grits, can be employed, for example, in mirror finish cutting applications, thereby enabling ‘1×’ or ‘single-pass’ multi-function abrasive processes. The specific selection of resin and metal or metal alloy types is such that the tool is sufficiently brittle for the purpose of manufacture and durability, but ductile enough to withstand the grinding and handling stresses (an exemplary hybrid bond includes bronze and polyimide). Numerous tool types and applications will be apparent in light of this disclosure, including abrasive products for electronic device manufacturing such as thin 1A8 blades (single blade or multi-blade configuration).
    Type: Application
    Filed: December 10, 2008
    Publication date: June 18, 2009
    Inventors: Rachana D. Upadhyay, Srinivasan Ramanath, Robert F. Corcoran, JR., Thomas Puthanangady, Richard W. J. Hall, Lynn L. Harley