Patents by Inventor Rachana Upadhyay

Rachana 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: 8814967
    Abstract: An abrasive article includes a bonded abrasive having a body made of abrasive grains contained within a composite bond material. The composite bond material can include an organic material and a metal material. The body can also include a filler material made of a superabrasive material. In an embodiment, the filler material can have an average particle size at least about 10 times less than an average particle size of the abrasive grains.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 26, 2014
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Rachana Upadhyay, Srinivasan Ramanath
  • Publication number: 20140202085
    Abstract: An abrasive article includes a body having abrasive grains contained within a bond material comprising a metal or metal alloy, wherein the body comprises a ratio of VAG/VBM of at least about 1.3, wherein VAG is the volume percent of abrasive grains within the total volume of the body and VBM is the volume percent of bond material within the total volume of the body.
    Type: Application
    Filed: March 21, 2014
    Publication date: July 24, 2014
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay
  • Patent number: 8784519
    Abstract: A vitrified superabrasive product includes a superabrasive component and a vitrified bond component in which the superabrasive component is dispersed. The vitrified bond includes an oxide of a lanthanoid. Additionally, the vitrified bond component defines pores that can be essentially all less than 800 ?m in diameter. Seventy percent of the pores are in a range of between about 40 ?m and about 500 ?m and have an average aspect ratio less than about 2. The porosity is in a range of between about 50% and about 90% of the total volume of the superabrasive product.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: July 22, 2014
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Ramanujam Vedantham, Rachana Upadhyay, Gilles Querel
  • Publication number: 20140187125
    Abstract: An abrasive article comprising: a first body comprising a first bond material having abrasive particles contained within the first bond material, wherein the first body comprising the first bond material comprises a ratio of VAG(1)/VBM(1) of at least about 1.3; a second body comprising a second bond material having abrasive particles contained within the second bond material, wherein the second body comprising the second bond material comprises a ratio of VAG(2)/VBM(2) of less than about 1.3, and wherein VAG is a volume percent of abrasive particles within a total volume of the first or second body respectively and VBM is a volume percent of the first or second bond material within the total volume of the first or second body respectively.
    Type: Application
    Filed: December 30, 2013
    Publication date: July 3, 2014
    Applicants: Saint-Gobain Abrasifs, Saint-Gobain Abrasives, Inc.
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay, Lenny C. Sales, Marc A. Lamoureux, Matthew F. Jacob, Cong Wang
  • Publication number: 20140187124
    Abstract: An abrasive article configured to grind a workpiece having a fracture toughness at least about 7 MPa·m0.5 includes a body comprising abrasive particles contained within a bond material comprising a metal, wherein the body comprises a ratio of VAG/VBM of at least about 1.3, wherein VAG is a volume percent of abrasive particles within a total volume of the body and VBM is a volume percent of bond material within the total volume of the body, and wherein the abrasive particles have an average particle size of 40 to 60 microns.
    Type: Application
    Filed: December 30, 2013
    Publication date: July 3, 2014
    Applicants: Saint-Gobain Abrasifs, Saint-Gobain Abrasives, Inc.
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay, Cong Wang
  • Publication number: 20140187129
    Abstract: An abrasive article includes a core comprising an organic material and a first bonded abrasive body integrally bonded directly to the core, wherein the bonded abrasive body includes a bond material, and abrasive particles contained within the bond material.
    Type: Application
    Filed: December 30, 2013
    Publication date: July 3, 2014
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Shivshankar Sivasubramanian, Srinivasan Ramanath, Rachana Upadhyay, Steven W. Dumas, John E. Gillespie, Robert N. Smith, Rachel Z. Pytel
  • Publication number: 20140182214
    Abstract: An abrasive article including a bonded abrasive body having a bond material made of a vitrified material, abrasive particles comprising a first type of superabrasive material contained in the bond material, a porosity of at least about 50 vol % of the total volume of the bonded abrasive body, and a ?CTE of not greater than about 5.5 ppm/° C., wherein ?CTE is defined as a difference between a CTE of the bond material and a CTE of the abrasive particles.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 3, 2014
    Inventors: Shivshankar Sivasubramanian, Srinivasan Ramanath, Ramanujam Vedantham, Rachana Upadhyay, Signo Reis
  • Publication number: 20140187123
    Abstract: An abrasive article configured to grind a workpiece having a fracture toughness of less than about 6 MPa·m ½ includes a body comprising abrasive particles contained within a bond material comprising a metal, wherein the body comprises a ratio of VAG/VBM of at least about 1.3, wherein VAG is a volume percent of abrasive particles within a total volume of the body and VBM is a volume percent of bond material within the total volume of the body, and wherein the abrasive particles have an average particle size of 1 to 45 microns.
    Type: Application
    Filed: December 30, 2013
    Publication date: July 3, 2014
    Applicants: Saint-Gobain Abrasifs, Saint-Gobain Abrasives, Inc.
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay, Cong Wang
  • Patent number: 8715381
    Abstract: An abrasive article includes a body having abrasive grains contained within a bond material comprising a metal or metal alloy, wherein the body comprises a ratio of VAG/VBM of at least about 1.3, wherein VAG is the volume percent of abrasive grains within the total volume of the body and VBM is the volume percent of bond material within the total volume of the body.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: May 6, 2014
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay
  • Publication number: 20130000211
    Abstract: An abrasive article includes a bonded abrasive having a body made of abrasive grains contained within a composite bond material. The composite bond material can include an organic material and a metal material. The body can also include a filler material made of a superabrasive material. In an embodiment, the filler material can have an average particle size at least about 10 times less than an average particle size of the abrasive grains.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Rachana Upadhyay, Srinivasan Ramanath
  • Publication number: 20120279139
    Abstract: A superabrasive resin product includes a superabrasive grain component, an oxide component, and a continuous phase defining a network of interconnected pores. The oxide component consists of an oxide of a lanthanoid, and the continuous phase includes a thermoplastic polymer component. The superabrasive grain component and the oxide component are distributed in the continuous phase.
    Type: Application
    Filed: October 27, 2010
    Publication date: November 8, 2012
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Ramanujam Vedantham, Rachana Upadhyay
  • Publication number: 20120266543
    Abstract: A vitrified superabrasive product includes a superabrasive component and a vitrified bond component in which the superabrasive component is dispersed. The vitrified bond includes an oxide of a lanthanoid. Additionally, the vitrified bond component defines pores that can be essentially all less than 800 ?m in diameter. Seventy percent of the pores are in a range of between about 40 ?m and about 500 ?m and have an average aspect ratio less than about 2. The porosity is in a range of between about 50% and about 90% of the total volume of the superabrasive product.
    Type: Application
    Filed: October 27, 2010
    Publication date: October 25, 2012
    Applicants: Saint-Gobain Abrasifs, Saint-Gobain Abrasives, Inc.
    Inventors: Ramanujam Vedantham, Rachana Upadhyay, Gilles Querel
  • Publication number: 20120066982
    Abstract: An abrasive tool having a bonded abrasive body including abrasive grains contained within a bond material comprising a metal. During a grinding operation, the bonded abrasive body has a power variance [(Po?Pn)/Po]×100% of not greater than about 40%, wherein Po represents the grinding power to grind a workpiece with the bonded abrasive body at an initial grinding cycle and Pn represents the grinding power to grind the workpiece for a nth grinding cycle, wherein n>4.
    Type: Application
    Filed: September 2, 2011
    Publication date: March 22, 2012
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay
  • Publication number: 20120055098
    Abstract: An abrasive article includes a body having abrasive grains contained within a bond material comprising a metal or metal alloy, wherein the body comprises a ratio of VAG/VBM of at least about 1.3, wherein VAG is the volume percent of abrasive grains within the total volume of the body and VBM is the volume percent of bond material within the total volume of the body.
    Type: Application
    Filed: September 2, 2011
    Publication date: March 8, 2012
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay
  • Publication number: 20120040589
    Abstract: A method of grinding a superabrasive workpiece includes placing a bonded abrasive article in contact with a superabrasive workpiece, wherein the bonded abrasive article comprises a body including abrasive grains contained within a bond material, and the superabrasive workpiece has an average Vickers hardness of at least about 1 GPa, and removing material from the superabrasive workpiece at an average specific grinding energy (SGE) of not greater than about 350 J/mm3, at an average material removal (MRR) rate of at least about 8 mm3/sec for a centerless grinding operation.
    Type: Application
    Filed: August 16, 2011
    Publication date: February 16, 2012
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Rachana Upadhyay, Srinivasan Ramanath, Christopher Arcona, John E. Gillespie
  • Publication number: 20120036789
    Abstract: An abrasive article including a bonded abrasive having a body formed of abrasive grains contained within a bond material, wherein the body grinds a superabrasive workpiece having an average Vickers hardness of at least about 5 GPa at an average specific grinding energy (SGE) of not greater than about 350 J/mm3, at a material removal rate of at least about 8 mm3/sec, and wherein grinding is a centerless grinding operation.
    Type: Application
    Filed: August 16, 2011
    Publication date: February 16, 2012
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Rachana UPADHYAY, Srinivasan Ramanath, Christopher Arcona, John E. Gillespie
  • Publication number: 20090264050
    Abstract: An abrasive article includes a polymer matrix and abrasive grains dispersed in the polymer matrix, wherein the abrasive article has a void volume of at least 50%. The polymer matrix is polymerized from a monomer including at least one double bond.
    Type: Application
    Filed: February 17, 2009
    Publication date: October 22, 2009
    Applicants: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Rachana Upadhyay, Richard W. J. Hall