Patents by Inventor Raghavan Rengarajan

Raghavan Rengarajan 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).

  • Hard material and method of making the same from an aqueous hard material milling slurry
    Patent number: 10538829
    Abstract: An aqueous emulsion for use in aqueous milling of hard material powder components in an aqueous slurry. The aqueous emulsion includes an oxidation inhibitor in an amount between about 0.3 weight percent and about 1.2 weight percent of the hard material powder components in the aqueous slurry. The aqueous emulsion also includes a paraffin wax in an amount between about 0.25 weight percent and about 0.75 weight percent of the hard material powder components in the aqueous slurry for vacuum dried powder and in an amount about up to 2.75 weight percent of the hard material powder components in the aqueous slurry for spray dried powder. The aqueous emulsion also includes myristic acid in an amount between about 0.10 weight percent and about 0.50 weight percent of the hard material powder components in the aqueous slurry. The balance of the aqueous emulsion is water.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: January 21, 2020
    Assignee: KENNAMETAL INDIA LIMITED
    Inventors: Sivaraman Gopalrao, Raghavan Rengarajan, Ramesh S. Rao, Alam Rukhsar
  • Methods of milling carbide and applications thereof
    Patent number: 10040123
    Abstract: In one aspect, methods of milling carbide are described herein. A method of milling carbide comprises placing a particulate composition comprising carbide in a vessel containing milling media and placing an additive in the vessel, the additive undergoing evaporation or sublimation to provide a non-oxidative atmosphere in the vessel. The carbide particles are comminuted with the milling media in the non-oxidative atmosphere.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: August 7, 2018
    Assignee: Kennametal India Limited
    Inventors: Raghavan Rengarajan, Gopalrao Sivaraman, Ramesh Sathyanarayan Rao, Alam Rukhsar, Jagannath Vaishali
  • HARD MATERIAL AND METHOD OF MAKING THE SAME FROM AN AQUEOUS HARD MATERIAL MILLING SLURRY
    Publication number: 20150098856
    Abstract: An aqueous emulsion for use in aqueous milling of hard material powder components in an aqueous slurry. The aqueous emulsion includes an oxidation inhibitor in an amount between about 0.3 weight percent and about 1.2 weight percent of the hard material powder components in the aqueous slurry. The aqueous emulsion also includes a paraffin wax in an amount between about 0.25 weight percent and about 0.75 weight percent of the hard material powder components in the aqueous slurry for vacuum dried powder and in an amount about up to 2.75 weight percent of the hard material powder components in the aqueous slurry for spray dried powder. The aqueous emulsion also includes myristic acid in an amount between about 0.10 weight percent and about 0.50 weight percent of the hard material powder components in the aqueous slurry. The balance of the aqueous emulsion is water.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 9, 2015
    Inventors: Sivaraman Gopalrao, Raghavan Rengarajan, Ramesh S. Rao, Alam Rukhsar
  • Methods Of Milling Carbide And Applications Thereof
    Publication number: 20140341772
    Abstract: In one aspect, methods of milling carbide are described herein. A method of milling carbide comprises placing a particulate composition comprising carbide in a vessel containing milling media and placing an additive in the vessel, the additive undergoing evaporation or sublimation to provide a non-oxidative atmosphere in the vessel. The carbide particles are comminuted with the milling media in the non-oxidative atmosphere.
    Type: Application
    Filed: May 7, 2014
    Publication date: November 20, 2014
    Applicant: Kennametal lndia Limited
    Inventors: Raghavan Rengarajan, Gopalrao Sivaraman, Ramesh Sathyanarayan Rao, Alam Rukhsar, Jagannath Vaishali
  • Process For Joining Carbide And Non Carbide Materials And The Method Thereof
    Publication number: 20130337283
    Abstract: In one embodiment, a process for joining carbide and non-carbide materials is disclosed, the process comprising providing an interface binder material, positioning the interface binder material between the carbide material and non-carbide material to provide an assembly and heating the assembly to join the carbide material and non-carbide material through the interface binder material, wherein the interface binder material comprises a powder metal or powder alloy or a sheet of metal or alloy.
    Type: Application
    Filed: May 8, 2013
    Publication date: December 19, 2013
    Applicant: Kennametal lndia Limited
    Inventors: Raghavan Rengarajan, Ramesh S. Rao, Jagannath Vaishali, Kuttan P. Pramodh, Bhaskar Alok, Gopalrao Rao Shivaram, Shenoy K. Chandrashekar