Patents by Inventor Sona Sivakova

Sona Sivakova 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: 20240150669
    Abstract: The disclosed technology relates to lubricants for driveline and industrial gears containing a combination of viscosity modifiers along with optional esters, as well as a method of lubricating driveline and industrial gears with such a lubricant.
    Type: Application
    Filed: February 28, 2022
    Publication date: May 9, 2024
    Applicant: The Lubrizol Corporation
    Inventors: Patricia Standen, William R.S. Barton, Thomas S. Corrigan, Sona Sivakova
  • Publication number: 20230002697
    Abstract: The disclosed technology relates to lubricants for driveline and industrial gears containing a mono-ester or a mixture of mono- and di-esters, as well as a method of lubricating driveline and industrial gears with such a lubricant.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 5, 2023
    Inventors: Kamalakumari K. Salem, William R.S. Barton, Thomas S. Corrigan, Sona Sivakova
  • Patent number: 11407959
    Abstract: Described herein is a process, comprising: a) selecting an API Group II base stock with selected viscosity index and pour point; b) blending a base oil with the base stock, and c) adding to the base oil: i) a liquid ethylene propylene copolymer viscosity modifier that reduces a traction coefficient, and ii) an additive package, to make a driveline fluid that has a defined viscosity index and excellent shear stability. Also provided is a driveline fluid composition having the high viscosity index and excellent shear stability, comprising: a) a base oil comprising from 50 wt % to 100 wt % API Group II base stock; b) a liquid ethylene propylene copolymer viscosity modifier that reduces a traction coefficient; and c) an additive package. Further provided is a method for lubricating an axle or manual transmission by supplying the driveline fluid composition.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 9, 2022
    Assignees: The Lubrizol Corporation, Chevron U.S.A. Inc.
    Inventors: Hyun-Soo Hong, John Aleksonis Zakarian, Sona Sivakova, Tomoya Higuchi, Christopher Engel, Farrukh Qureshi
  • Patent number: 11180711
    Abstract: A lubricant composition of an oil of lubricating viscosity, a grafted copolymer viscosity modifier that is an ashless condensation reaction product of an olefin polymer, having a number average molecular weight of about 1000 to about 10,000, comprising carboxylic acid or equivalent functionality grafted onto the polymer backbone, with a monoamine or a polyamine often having a single primary amino group, which exhibits good dispersancy and viscometric performance in a driveline device.
    Type: Grant
    Filed: August 16, 2018
    Date of Patent: November 23, 2021
    Assignee: The Lubrizol Corporation
    Inventors: Sona Sivakova, David M. Nickerson, Paul Simon O'Hora, William R. S. Barton
  • Publication number: 20210130732
    Abstract: A lubricant composition of an oil of lubricating viscosity, a grafted copolymer viscosity modifier that is an ashless condensation reaction product of an olefm polymer, having a number average molecular weight of about 1000 to about 10,000, comprising carboxylic acid or equivalent functionality grafted onto the polymer backbone, with a monoamine or a polyamine often having a single primary amino group, which exhibits good dispersancy and viscometric performance in a driveline device.
    Type: Application
    Filed: August 16, 2018
    Publication date: May 6, 2021
    Inventors: Sona Sivakova, David M. Nickerson, Paul Simon O'Hora, William R.S. Barton
  • Publication number: 20140178692
    Abstract: Disclosed is a transparent, radiation curable acrylate coating composition comprising (a) at least three polyfunctional acrylate derivatives, (b) a photoinitiator selected from the group consisting of phosphine oxides, ketones, and combinations thereof, (c) a nanoscale filler, and (d) a dibenzoyl resorcinol UV absorber, at least one of said acrylate derivatives being an aliphatic polyester urethane multi-acrylate having an acrylate functionality of at least 5 and an elongation of no greater than 5%, and at least two of said acrylate derivatives being diacrylates, wherein at least one of said diacrylates is an aliphatic Polyester urethane diacrylate having an elongation of greater than 5% and a number average molecular weight of from 500 to about 2500 and wherein another of said diacrylates is a urethane-free diacrylate having a number average molecular weight of from about 150 to about 600.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: Momentive Performance Materials Inc.
    Inventors: Jeanne Elizabeth Haubrich, Sona Sivakova Slocum
  • Patent number: 8754145
    Abstract: Disclosed is a transparent, radiation curable acrylate coating composition comprising (a) at least three polyfunctional acrylate derivatives, (b) a photoinitiator selected from the group consisting of phosphine oxides, ketones, and combinations thereof, (c) a nanoscale filler, and (d) a dibenzoyl resorcinol UV absorber, at least one of said acrylate derivatives being an aliphatic polyester urethane multi-acrylate having an acrylate functionality of at least 5 and an elongation of no greater than 5%, and at least two of said acrylate derivatives being diacrylates, wherein at least one of said diacrylates is an aliphatic Polyester urethane diacrylate having an elongation of greater than 5% and a number average molecular weight of from 500 to about 2500 and wherein another of said diacrylates is a urethane-free diacrylate having a number average molecular weight of from about 150 to about 600.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: June 17, 2014
    Assignee: Momentive Performance Materials Inc.
    Inventors: Jeanne Elizabeth Haubrich, Sona Sivakova Slocum
  • Publication number: 20080020170
    Abstract: A substate possesses a transparent protective layer derived from a radiation-curable acrylate composition which comprises: a) at least one urethane polyacrylate possessing a number average molecular weight of at least about 400 per acrylate group and having a Tg of not greater than about 40° C.; b) at least one crosslinking polyacrylate having a Tg of at least about 50° C.; c) at least one hydrophobic monoacrylate; and, d) at least one photoinitiator.
    Type: Application
    Filed: July 19, 2006
    Publication date: January 24, 2008
    Inventors: Jeanne E. Haubrich, Wen P. Liao, Sona Sivakova Slocum
  • Publication number: 20080020169
    Abstract: An optical data storage medium comprises: a) a substrate; b) at least one data layer on substrate (a); and, c) at least one transparent protective layer on data layer (b), the transparent protective layer being formed from a radiation curable acrylate composition and exhibiting upon the cure thereof a modulus of not greater than about 500 MPa, a shrinkage of less than about 8 percent, a scratch resistance of less than about 5 percent and a Tg of from about 20 to about 60° C.
    Type: Application
    Filed: July 19, 2006
    Publication date: January 24, 2008
    Inventors: Jeanne E. Haubrich, Wen P. Liao, Sona Sivakova Slocum
  • Publication number: 20080021128
    Abstract: A radiation-curable acrylate composition comprises: a) at least one urethane polyacrylate possessing a number average molecular weight of at least about 400 per acrylate group and having a Tg of not greater than about 40° C.; b) at least one crosslinking polyacrylate having a Tg of at least about 50° C.; c) at least one hydrophobic monoacrylate; and, d) at least one photoinitiator.
    Type: Application
    Filed: July 19, 2006
    Publication date: January 24, 2008
    Inventors: Jeanne E. Haubrich, Wen P. Liao, Sona Sivakova Slocum