Patents by Inventor Srinivasan Ramanath

Srinivasan Ramanath 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).

  • Publication number: 20230294243
    Abstract: An abrasive structure for abrading work pieces, comprising: a composite cluster formed of abrasives of two or more sizes, wherein a larger size abrasive forms a core of the abrasive structure with a smaller size abrasive attached on an exterior of the core.
    Type: Application
    Filed: March 15, 2023
    Publication date: September 21, 2023
    Inventors: Srinivasan RAMANATH, Joseph E. Smith, Samuel Lyman Munson, IV
  • Publication number: 20220388114
    Abstract: An abrasive composition including a substrate with perforations. The perforations may have curved edges and different shapes. Abrasive particles to be braised to the substrate are sprinkled over the molten braise on the surface of the substrate, including on the curved edges of the perforations. The perforations provide a view of the work surface for the user and reduce noise, and also provide places for work surface debris to collect for later removal. The shape of the substrate itself may include particular surface areas intended for specific abrasion tasks, such as flat surfaces with different grades of abrasive particles and small radius edges for use as a cutting tool.
    Type: Application
    Filed: June 7, 2021
    Publication date: December 8, 2022
    Inventors: Samuel Lyman Munson, IV, Joseph E. Smith, JR., Srinivasan Ramanath
  • Patent number: 10946499
    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: Grant
    Filed: October 31, 2017
    Date of Patent: March 16, 2021
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Srinivasan Ramanath, William H. Lane, Rachana Upadhyay, Michael P. Hitchiner
  • Publication number: 20200055162
    Abstract: An abrasive article can include a body including a bond material comprising an inorganic material, abrasive particles and a filler comprising a nitride. The filler comprising a nitride can compensate shrinkage of the body during sintering while maintaining required strength and wear properties of the body.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 20, 2020
    Inventors: Charles J. GASDASKA, Alexandre TEMPERELLI, Kenneth DUBOVICK, Rachana UPADHYAY, Maxime JACQUEMIN, Srinivasan RAMANATH, Robin M. BRIGHT
  • Patent number: 10377016
    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: August 6, 2015
    Date of Patent: August 13, 2019
    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
  • Patent number: 10377017
    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: May 11, 2017
    Date of Patent: August 13, 2019
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay
  • Patent number: 10213902
    Abstract: An abrasive article including a body having a bond material comprising an inorganic material, abrasive particles contained within the bond materials; and pores contained within the bond material defining a porosity of at least 90 vol % and not greater than 97 vol % for a total volume of the body.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: February 26, 2019
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Shivshankar Sivasubramanian, Signo T. Reis, Linda S. Bateman, Lisa A. Johnson, Rachana Upadhyay, Srinivasan Ramanath, Ramanujam Vedantham, Taewook Hwang, Andrew L. Biro
  • Patent number: 10105821
    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: Grant
    Filed: December 22, 2014
    Date of Patent: October 23, 2018
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Cecile O. Mejean, Srinivasan Ramanath, Ramanujam Vedantham, John M. Gulcius, Rachana Upadhyay
  • Publication number: 20180281153
    Abstract: The present disclosure relates to an abrasive article including a body having a bond material including metal and a micro-porosity within the bond material with an average pore size (D50) of not greater than 10 microns and a pore size standard deviation of at least 0.2 microns, and the body further includes abrasive particles contained within the bond material and having an ellipticity of not greater than 1.18 or an average toughness of at least 11257 cycles.
    Type: Application
    Filed: March 29, 2018
    Publication date: October 4, 2018
    Inventors: Jiashu LI, Kelley McNEAL, Srinivasan RAMANATH, Cecile O. MEJEAN, Ji WANG
  • Patent number: 10086499
    Abstract: An abrasive article includes a body having an annular surface including abrasive segments coupled to the annular surface, and the abrasive segments define an abrasive annular region and a percent abrasive surface area of not greater than 24% for the total surface area of the abrasive annular region.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 2, 2018
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Cecile O. Mejean, Srinivasan Ramanath, Ramanujam Vedantham, Kelley McNeal
  • Publication number: 20180117736
    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: October 31, 2017
    Publication date: May 3, 2018
    Inventors: Srinivasan Ramanath, William H. Lane, Rachana Upadhyay, Michael P. Hitchiner
  • Patent number: 9833877
    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: Grant
    Filed: March 31, 2014
    Date of Patent: December 5, 2017
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Srinivasan Ramanath, William H. Lane, Rachana Upadhyay, Michael P. Hitchiner
  • Publication number: 20170246726
    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: May 11, 2017
    Publication date: August 31, 2017
    Inventors: Srinivasan RAMANATH, Kenneth A. SAUCIER, Rachana UPADHYAY
  • Patent number: 9724805
    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: Grant
    Filed: June 27, 2014
    Date of Patent: August 8, 2017
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Srinivasan Ramanath, Rachana Upadhyay, Robert F. Corcoran, Jr., Cong Wang
  • Patent number: 9676077
    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: December 30, 2015
    Date of Patent: June 13, 2017
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Srinivasan Ramanath, Kenneth A. Saucier, Rachana Upadhyay
  • Publication number: 20170066069
    Abstract: An abrasive article including a substrate having an elongated body, a tacking layer overlying the substrate, a first type of abrasive particle overlying the tacking layer, a second type of abrasive particle different than the first type of abrasive particles overlying the tacking layer, and a bonding layer overlying at least a portion of one of the first type of abrasive particle and the second type of abrasive particle and the tacking layer.
    Type: Application
    Filed: November 18, 2016
    Publication date: March 9, 2017
    Inventors: Paul W. REHRIG, Yinggang TIAN, Wei CHE, Arup K. KHAUND, Thomas PUTHANANGADY, Christopher ARCONA, Srinivasan RAMANATH
  • Publication number: 20170008153
    Abstract: An abrasive article including a body having a bond material comprising an inorganic material, abrasive particles contained within the bond materials; and pores contained within the bond material defining a porosity of at least 90 vol % and not greater than 97 vol % for a total volume of the body.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 12, 2017
    Inventors: Shivshankar Sivasubramanian, Signo T. Reis, Linda S. Bateman, Lisa A. Johnson, Rachana Upadhyay, Srinivasan Ramanath, Ramanujam Vedantham, Taewook Hwang, Andrew L. Biro
  • Patent number: 9533397
    Abstract: An abrasive article including a substrate having an elongated body, a tacking layer overlying the substrate, a first type of abrasive particle overlying the tacking layer, a second type of abrasive particle different than the first type of abrasive particles overlying the tacking layer, and a bonding layer overlying at least a portion of one of the first type of abrasive particle and the second type of abrasive particle and the tacking layer.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: January 3, 2017
    Assignees: SAINT-GOBAIN ABRASIVES, INC., SAINT-GOBAIN ABRASIFS
    Inventors: Paul W. Rehrig, Yinggang Tian, Wei Che, Arup K. Khaund, Thomas Puthanangady, Christopher Arcona, Srinivasan Ramanath
  • Publication number: 20160256982
    Abstract: An abrasive article includes a body having an annular surface including abrasive segments coupled to the annular surface, and the abrasive segments define an abrasive annular region and a percent abrasive surface area of not greater than 24% for the total surface area of the abrasive annular region.
    Type: Application
    Filed: March 4, 2016
    Publication date: September 8, 2016
    Inventors: Cecile O. MEJEAN, Srinivasan RAMANATH, Ramanujam VEDANTHAM, Kelley MCNEAL
  • Patent number: 9381618
    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: Grant
    Filed: April 22, 2014
    Date of Patent: July 5, 2016
    Assignees: 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