Patents by Inventor Tushar K. Bera

Tushar K. Bera 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).

  • Marine engine lubrication
    Patent number: 10364404
    Abstract: A trunk piston marine engine lubricant comprises in respective minor amounts (A) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent system, and (B) a hydrocarbyl-substituted succinic acid anhydride made by halogen- or radical-assisted functionalization processes, where the ratio of succinic anhydride to hydrocarbyl chains is in the range of 1.4 to 4. The lubricant, when used to lubricate such an engine fuelled by heavy fuel oil, exhibits improved control of asphaltene precipitation and deposition on engine surfaces.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: July 30, 2019
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: Tushar K. Bera, Rachel Tundel, Laura Gregory, Peter M. Wright
  • Lubricating oil compositions containing sterically hindered amines as ashless TBN sourcces
    Patent number: 9969950
    Abstract: Hindered amines useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials, and lubricating oil compositions containing such compounds.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: May 15, 2018
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: Tushar K. Bera, Joseph P. Hartley, Guifeng Li, Gabriele Candido, Christina Gulacsy
  • Marine engine lubrication
    Patent number: 9879202
    Abstract: A trunk piston marine engine lubricant comprises in respective minor amounts (A) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent system, and (B) a hydrocarbyl-substituted succinic acid anhydride, preferably made by halogen- or radical-assisted fractionalization processes, where the ratio of succinic anhydride to hydrocarbyl chains is in the range of 1.4 to 4. The lubricant, when used to lubricate such an engine fuelled by heavy fuel oil, exhibits improved control of asphaltene precipitation and deposition on engine surfaces.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: January 30, 2018
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: Tushar K. Bera, Laura Gregory, Rachel Tundel, Peter M. Wright
  • Marine Engine Lubrication
    Publication number: 20160230113
    Abstract: A trunk piston marine engine lubricant comprises in respective minor amounts (A) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent system, and (B) a hydrocarbyl-substituted succinic acid anhydride made by halogen- or radical-assisted functionalization processes, where the ratio of succinic anhydride to hydrocarbyl chains is in the range of 1.4 to 4. The lubricant, when used to lubricate such an engine fuelled by heavy fuel oil, exhibits improved control of asphaltene precipitation and deposition on engine surfaces.
    Type: Application
    Filed: October 27, 2015
    Publication date: August 11, 2016
    Applicant: Infineum International Limited
    Inventors: Tushar K. Bera, Rachel Tundel, Laura Gregory, Peter M. Wright
  • MARINE ENGINE LUBRICATION
    Publication number: 20160160149
    Abstract: A trunk piston marine engine lubricant comprises in respective minor amounts (A) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent system, and (B) a hydrocarbyl-subsituted succinic acid anhydride, preferably made by halogen- or radical-assisted fractionalization processes, where the ratio of succinic anhydride to hydrocarbyl chains is in the range of 1.4 to 4. The lubricant, when used to lubricate such an engine fuelled by heavy fuel oil, exhibits improved control of asphaltene precipitation and deposition on engine surfaces.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 9, 2016
    Applicant: Infineum International Limited
    Inventors: Tushar K. Bera, Laura Gregory, Rachel Tundel, Peter M. Wright
  • Lubricating oil compositions containing sterically hindered amines as ashless TBN sources
    Patent number: 9145530
    Abstract: Hindered amines useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials, and lubricating oil compositions containing such compounds.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: September 29, 2015
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: Tushar K. Bera, Joseph P. Hartley, Guifeng Li, Gabriele Candido, Christina E. Gulacsy
  • LUBRICATING OIL COMPOSITIONS CONTAINING STERICALLY HINDERED AMINES AS ASHLESS TBN SOURCES
    Publication number: 20140162923
    Abstract: Hindered amines useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials, and lubricating oil compositions containing such compounds.
    Type: Application
    Filed: December 10, 2012
    Publication date: June 12, 2014
    Inventors: Tushar K. Bera, Joseph P. Hartley, Guifeng Li, Gabriele Candido, Christina E. Gulacsy
  • Lubricating Oil Compositions Containing Sterically Hindered Amines as Ashless TBN Sourcces
    Publication number: 20140024569
    Abstract: Hindered amines useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials, and lubricating oil compositions containing such compounds.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 23, 2014
    Inventors: Tushar K. Bera, Joseph P. Hartley, Guifeng Li, Gabriele Candido, Christina Gulacsy
  • Morpholine derivatives as ashless TBN sources and lubricating oil compositions containing same
    Patent number: 8143201
    Abstract: Morpholine derivatives useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials, and lubricating oil compositions containing such compounds.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: March 27, 2012
    Assignee: Infineum International Limited
    Inventors: Jacob Emert, Jie Cheng, Jun Hua, Tushar K. Bera, Mark L. Bushey, Jesse D. Dambacher
  • Lubricating Oil Composition
    Publication number: 20110239978
    Abstract: A lubricating oil composition comprising (A) an oil of lubricating viscosity; and, (B) as an additive component, an oil-soluble mixture of oxyalkylated hydrocarbyl phenol condensates wherein the oxyalkyl groups have the formula —(R?O)n— where R? is an ethylene, a propylene or a butylene group; n is independently from 0 to 10; less than 45 mole % of the phenolic hydroxyl groups in the mixture are not oxyalkylated; and more than 55 mole % of the oxyalkyl groups in the mixture have the formula —R?O— where n is 1.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 6, 2011
    Inventors: Jesse D. Dambacher, Tushar K. Bera, Philip Skinner, Jacob Emert, Richard J. Severt, Adam P. Marsh
  • Morpholine Derivatives as Ashless TBN Sources and Lubricating Oil Compositions Containing Same
    Publication number: 20110224114
    Abstract: Morpholine derivatives useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials, and lubricating oil compositions containing such compounds.
    Type: Application
    Filed: March 9, 2010
    Publication date: September 15, 2011
    Inventors: Jacob Emert, Jie Cheng, Jun Hua, Tushar K. Bera, Mark L. Bushey, Jesse D. Dambacher
  • Soot Dispersants and Lubricating Oil Compositions Containing Same
    Publication number: 20100286414
    Abstract: Linked aromatic compounds found to act as potent soot dispersants in lubricating oil compositions; lubricating oil compositions containing such soot dispersants and precursor compounds from which the soot dispersants are derived.
    Type: Application
    Filed: July 20, 2010
    Publication date: November 11, 2010
    Inventors: Tushar K. Bera, Jacob Emert, Jun Hua
  • Soot dispersants and lubricating oil compositions containing same
    Patent number: 7786057
    Abstract: Linked aromatic compounds found to act as potent soot dispersants in lubricating oil compositions; lubricating, oil compositions containing such soot dispersants and precursor compounds from which the soot dispersants are derived.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: August 31, 2010
    Assignee: Infineum International Limited
    Inventors: Tushar K. Bera, Jacob Emert, Jun Hua
  • Soot dispersants and lubricating oil compositions containing same
    Patent number: 7485603
    Abstract: Linked aromatic compounds found to act as potent soot dispersants in lubricating oil compositions; lubricating oil compositions containing such soot dispersants and precursor compounds from which the soot dispersants are derived.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: February 3, 2009
    Assignee: Infineum International Limited
    Inventors: Tushar K. Bera, Nancy Z. Diggs, Rolfe J. Hartley, Jacob Emert, Michael L. Alessi, Jun Hua
  • Soot Dispersants and Lubricating Oil Compositions Containing Same
    Publication number: 20080194438
    Abstract: Linked aromatic compounds found to act as potent soot dispersants in lubricating oil compositions; lubricating, oil compositions containing such soot dispersants and precursor compounds from which the soot dispersants are derived.
    Type: Application
    Filed: February 8, 2007
    Publication date: August 14, 2008
    Inventors: Tushar K. Bera, Jacob Emert, Jun Hua