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: 9254553
    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: March 21, 2014
    Date of Patent: February 9, 2016
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay
  • Patent number: 9242345
    Abstract: An abrasive tool is provided that may include a body, which may include abrasive particles contained within a bond material. The abrasive particles may be a super abrasive material. The body may further include at least one of a ratio of tungsten to cast iron (W/CI) of not greater than about 1, a ratio of copper-containing compositions to cast iron (CCC/CI) of not greater than about 1, a ratio of titanium-containing compositions to cast-iron (TiCC/CI) of not greater than about 1, a ratio of tungsten carbide to cast iron (WC/CI) of not greater than about 1, a ratio of tungsten carbide to copper-containing compositions (WC/CCC) of not greater than about 1, a ratio of copper-containing compositions and titanium-containing compositions to cast iron ((CCC+TiC)/CI) of not greater than about 1.5 or a combination thereof.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: January 26, 2016
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Debdutta Roy, Srinivasan Ramanath, John Tunstall, Rachana Upadhyay, Arup K. Khaund
  • Publication number: 20150375367
    Abstract: An abrasive article including a core including an organic material and a first bonded abrasive body integrally bonded directly to the core, the first bonded abrasive body having abrasive particles contained within a bond material and the abrasive article having a bonding factor of at least about 60%.
    Type: Application
    Filed: June 29, 2015
    Publication date: December 31, 2015
    Inventors: Shivashankar SIVASUBRAMANIAN, Jiashu LI, Rachana UPADHYAY, Srinivasan RAMANATH, Stephen BOTTIGLIERI, Steven W. DUMAS, John E. GILLESPIE, Robert N. SMITH, Rachel Z. PYTEL
  • Publication number: 20150360346
    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: August 21, 2015
    Publication date: December 17, 2015
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Rachana UPADHYAY, Ramanujam VEDANTHAM
  • Publication number: 20150336240
    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: August 6, 2015
    Publication date: November 26, 2015
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay, Lenny C. Sales, Marc A. Lamoureux, Matthew F. Jacob, Cong Wang
  • Patent number: 9138866
    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: Grant
    Filed: October 27, 2010
    Date of Patent: September 22, 2015
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Ramanujam Vedantham, Rachana Upadhyay
  • Patent number: 9102039
    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: Grant
    Filed: December 30, 2013
    Date of Patent: August 11, 2015
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay, Lenny C. Sales, Marc A. Lamoureux, Matthew F. Jacob, Cong Wang
  • Publication number: 20150183086
    Abstract: A bonded abrasive article suitable for processing hard materials such as sapphire. In an embodiment, an abrasive article includes a bonded abrasive body including a bond material comprising a metal, abrasive particles contained within the bond material having an average particle size of not greater than about 20 ?m, and a pore size standard deviation of not greater than about 16 ?m. An abrasive article can also include a bonded abrasive body having a bond material comprising metal, abrasive particles contained within the bond material having an average particle size of not greater than about 20 ?m, and an average pore size of not greater than about 110 ?m.
    Type: Application
    Filed: December 22, 2014
    Publication date: July 2, 2015
    Inventors: Cecile O. MEJEAN, Srinivasan RAMANATH, Ramanujam VEDANTHAM, John M. GULCIUS, Rachana UPADHYAY
  • Publication number: 20150174735
    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 27, 2015
    Publication date: June 25, 2015
    Inventors: Rachana Upadhyay, Richard W. J. Hall
  • Patent number: 9056380
    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: Grant
    Filed: August 16, 2011
    Date of Patent: June 16, 2015
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Rachana Upadhyay, Srinivasan Ramanath, Christopher Arcona, John E. Gillespie
  • Patent number: 8992645
    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: Grant
    Filed: August 16, 2011
    Date of Patent: March 31, 2015
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Rachana Upadhyay, Srinivasan Ramanath, Christopher Arcona, John E. Gillespie
  • Patent number: 8986407
    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: Grant
    Filed: February 17, 2009
    Date of Patent: March 24, 2015
    Assignees: Saint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
    Inventors: Rachana Upadhyay, Richard W. J. Hall
  • Publication number: 20150059256
    Abstract: An abrasive article including a bonded abrasive body including a bond material having a metal, abrasive particles contained within the bond material, and a filler blend including fine filler particles and coarse filler particles and defining a filler particle size ratio (Ff/Fc) of not greater than about 0.97, where Ff represents the average particle of the fine filler particles and Fc represents the average particle size of the coarse filler particles.
    Type: Application
    Filed: August 19, 2014
    Publication date: March 5, 2015
    Inventors: Cecile O. MEJEAN, Srinivasan RAMANATH, John M. GULCIUS, Ramanujam VEDANTHAM, Rachana UPADHYAY
  • Publication number: 20150027062
    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: July 21, 2014
    Publication date: January 29, 2015
    Inventors: Rachana Upadhyay, Srinivasan Ramanath
  • Publication number: 20150000203
    Abstract: An abrasive article includes abrasive particles contained within a hybrid bond that may include a metal bond material and an organic bond material, the article having an average thickness of 250 microns or less and the metal bond material including a solid solution phase and an intermetallic phase distinct from the solid solution phase.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 1, 2015
    Inventors: Cong WANG, Srinivasan RAMANATH, Rachana UPADHYAY, Robert F. CORCORAN, JR.
  • Publication number: 20140366458
    Abstract: An abrasive tool is provided that may include a body, which may include abrasive particles contained within a bond material. The abrasive particles may be a super abrasive material. The body may further include at least one of a break-in length of not greater than about 1000 linear meters, a maximum initial speed character of at least about 10 m/min, a life span of at least about 1000 linear meters, a dressing frequency of at least about 25 parts/dress, an edge quality of at least about 25% of a workpiece free from defects and a combination thereof.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 18, 2014
    Inventors: Debdutta ROY, Srinivasan RAMANATH, John TUNSTALL, Rachana UPADHYAY, Arup K. KHAUND
  • Publication number: 20140366457
    Abstract: An abrasive tool is provided that may include a body, which may include abrasive particles contained within a bond material. The abrasive particles may be a super abrasive material. The body may further include at least one of a ratio of tungsten to cast iron (W/CI) of not greater than about 1, a ratio of copper-containing compositions to cast iron (CCC/CI) of not greater than about 1, a ratio of titanium-containing compositions to cast-iron (TiCC/CI) of not greater than about 1, a ratio of tungsten carbide to cast iron (WC/CI) of not greater than about 1, a ratio of tungsten carbide to copper-containing compositions (WC/CCC) of not greater than about 1, a ratio of copper-containing compositions and titanium-containing compositions to cast iron ((CCC+TiC)/CI) of not greater than about 1.5 or a combination thereof.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 18, 2014
    Inventors: Debdutta ROY, Srinivasan RAMANATH, John TUNSTALL, Rachana UPADHYAY, Arup K. KHAUND
  • Publication number: 20140323020
    Abstract: A grinding tool includes a shank having an axis, and at least two abrasive portions mounted directly to and in contact with the shank without a hub therebetween. Each of the abrasive portions has a substantially identical profile formed therein.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 30, 2014
    Applicants: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Rajesh KAUL, John TUNSTALL, Shivshankar SIVASUBRAMANIAN, Srinivasan RAMANATH, Rachana UPADHYAY, Arup K. KHAUND, Yinggang TIAN, John PEARLMAN, Michael D. CHENG, Cecile O. MEJEAN
  • Publication number: 20140298729
    Abstract: An abrasive article configured to grind a workpiece having a fracture toughness of at least about 5.5 MPa·m0.5 may include 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 at least about 1 micron and not greater than about 20 microns.
    Type: Application
    Filed: March 31, 2014
    Publication date: October 9, 2014
    Applicants: SAINT-GOBAIN ABRASIFS, SAINT-GOBAIN ABRASIVES, INC.
    Inventors: Srinivasan RAMANATH, William H. LANE, Rachana UPADHYAY, Michael P. HITCHINER
  • Publication number: 20140290149
    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: June 12, 2014
    Publication date: October 2, 2014
    Inventors: Ramanujam VEDANTHAM, Rachana UPADHYAY, Gilles QUEREL