Patents by Inventor Hitesh K. Trivedi

Hitesh K. Trivedi 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).

  • Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
    Patent number: 11667999
    Abstract: A method for producing a case-hardened martensitic stainless steel article includes: providing an article comprised, at least in part, of a martensitic stainless steel, carburizing the article within a temperature range of 1625° F.-1680° F. (885° C.-916° C.), and then carbo-nitriding the article within a temperature range of 1575° F.-1625° F. (857° C.-885° C.). An article, such as a bearing ring, comprising such a case-hardened martensitic stainless steel is also disclosed.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: June 6, 2023
    Assignees: UES INC., MIDWEST THERMAL-VAC INC., AKTIEBOLAGET SKF
    Inventors: Hitesh K. Trivedi, Frederick J. Otto, Timothy W. Piazza, Bryan A. McCoy, Rabi S. Bhattacharya
  • CARBO-NITRIDING PROCESS FOR MARTENSITIC STAINLESS STEEL AND STAINLESS STEEL ARTICLE HAVING IMPROVED CORROSION RESISTANCE
    Publication number: 20180320262
    Abstract: A method for producing a case-hardened martensitic stainless steel article includes: providing an article comprised, at least in part, of a martensitic stainless steel, carburizing the article within a temperature range of 1625° F.-1680° F. (885° C.-916° C.), and then carbo-nitriding the article within a temperature range of 1575° F.-1625° F. (857° C.-885° C.). An article, such as a bearing ring, comprising such a case-hardened martensitic stainless steel is also disclosed.
    Type: Application
    Filed: July 19, 2018
    Publication date: November 8, 2018
    Inventors: Hitesh K. Trivedi, Frederick J. Otto, Timothy W. Piazza, Bryan A. McCoy, Rabi S. Bhattacharya
  • Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
    Patent number: 10053763
    Abstract: A method for producing a case-hardened martensitic stainless steel article includes: providing an article comprised, at least in part, of a martensitic stainless steel, carburizing the article within a temperature range of 1625° F.-1680° F. (885° C.-916° C.), and then carbo-nitriding the article within a temperature range of 1575° F.-1625° F. (857° C.-885° C.). An article, such as a bearing ring, comprising such a case-hardened martensitic stainless steel is also disclosed.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: August 21, 2018
    Assignees: AKTIEBOLAGET SKF, MIDWEST THERMAL-VAC.INC., UES INC.
    Inventors: Hitesh K. Trivedi, Frederick J. Otto, Timothy W. Piazza, Bryan A. McCoy, Rabi S. Bhattacharya
  • CARBO-NITRIDING PROCESS FOR MARTENSITIC STAINLESS STEEL AND STAINLESS STEEL ARTICLE HAVING IMPROVED CORROSION RESISTANCE
    Publication number: 20140305548
    Abstract: A method for producing a case-hardened martensitic stainless steel article includes: providing an article comprised, at least in part, of a martensitic stainless steel, carburizing the article within a temperature range of 1625° F.-1680° F. (885° C.-916° C.), and then carbo-nitriding the article within a temperature range of 1575° F.-1625° F. (857° C.-885° C.). An article, such as a bearing ring, comprising such a case-hardened martensitic stainless steel is also disclosed.
    Type: Application
    Filed: May 31, 2012
    Publication date: October 16, 2014
    Applicants: AKTIEBOLAGET SKF, MIDWEST THERMAL-VAC INC., UES INC.
    Inventors: Hitesh K. Trivedi, Frederick J. Otto, Timothy W. Piazza, Bryan A. McCoy, Rabi S. Bhattacharya
  • Wear resistant coatings for race land regions of bearing materials
    Patent number: 7910217
    Abstract: Embodiments of a coated substrate (for example, a coated race land region of a roller bearing element) comprise a metallic substrate, a ceramic underlayer comprising a nitride, a carbide, a carbonitride, a boride, or combinations thereof disposed over the metallic substrate, and a mixed layer comprising titanium nitride and silver disposed over the ceramic underlayer; and an overlayer disposed over the mixed layer.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: March 22, 2011
    Assignee: UES, Inc.
    Inventors: Amarendra K. Rai, Rabi Bhattacharya, Hitesh K. Trivedi
  • WEAR RESISTANT COATINGS FOR RACE LAND REGIONS OF BEARING MATERIALS
    Publication number: 20080107917
    Abstract: Embodiments of a coated substrate (for example, a coated race land region of a roller bearing element) comprise a metallic substrate, a ceramic underlayer comprising a nitride, a carbide, a carbonitride, a boride, or combinations thereof disposed over the metallic substrate, and a mixed layer comprising titanium nitride and silver disposed over the ceramic underlayer; and an overlayer disposed over the mixed layer.
    Type: Application
    Filed: November 6, 2007
    Publication date: May 8, 2008
    Applicant: UES, INC.
    Inventors: Amarendra K. Rai, Rabi Bhattacharya, Hitesh K. Trivedi