Patents by Inventor David J. Sikora

David J. Sikora 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).

  • PROCESS FOR THE PREPARATION OF BROMINATED COPOLYMERS OF CONJUGATED DIENES AND STYRENIC MONOMERS
    Publication number: 20230174687
    Abstract: A brominated copolymer of at least one conjugated diene and at least one styrenic monomer is prepared such that at least 45 percent, but no more than 70 percent, of the non-aromatic double bonds In the copolymer are brominated. The produced brominated copolymer is useful as a flame retardant and exhibits surprisingly small domain sizes after dissolution in styrenic monomer which is subsequently polymerized.
    Type: Application
    Filed: April 16, 2021
    Publication date: June 8, 2023
    Applicant: LANXESS Corporation
    Inventors: Christopher Simpson, David W. Bartley, Roy Pickering, David J. Sikora
  • Crystallization suppressant combinations for high density clear brine fluids
    Patent number: 11525080
    Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines. Crystallization suppressant blends are also identified that allow for the preparation of high density clear brine fluids with lower viscosities.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: December 13, 2022
    Assignee: LANXESS Corporation
    Inventors: Thomas G. Ray, Colin H. Keene, David J. Sikora, David W. Bartley, John Warner, Justin Whitfield, Dwight Tshudy, Joni P. Williams
  • High densitiy clear brine fluids
    Patent number: 11021641
    Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: June 1, 2021
    Assignee: LANXESS Corporation
    Inventors: Thomas G. Ray, Colin H. Keene, David J. Sikora, David W. Bartley, John Warner, Justin Whitfield, Dwight Tshudy, Joni P. Williams
  • Crystallization Suppressant Combinations for High Density Clear Brine Fluids
    Publication number: 20200354623
    Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines. Crystallization suppressant blends are also identified that allow for the preparation of high density clear brine fluids with lower viscosities.
    Type: Application
    Filed: July 30, 2020
    Publication date: November 12, 2020
    Inventors: Thomas G. Ray, Colin H. Keene, David J. Sikora, David W. Bartley, John Warner, Justin Whitfield, Dwight Tshudy, Joni P. Williams
  • Crystallization suppressant combinations for high density clear brine fluids
    Patent number: 10745609
    Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines. Crystallization suppressant blends are also identified that allow for the preparation of high density clear brine fluids with lower viscosities.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: August 18, 2020
    Assignee: LANXESS Solutions US Inc.
    Inventors: Thomas G. Ray, Colin H. Keene, David J. Sikora, David W. Bartley, John Warner, Justin Whitfield, Dwight Tshudy, Joni P. Williams
  • HIGH DENSITIY CLEAR BRINE FLUIDS
    Publication number: 20190256758
    Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines.
    Type: Application
    Filed: May 2, 2019
    Publication date: August 22, 2019
    Inventors: Thomas G. Ray, Colin H. Keene, David J. Sikora, David W. Bartley, John Warner, Justin Whitfield, Dwight Tshudy, Joni P. Williams
  • Crystallization Suppressant Combinations for High Density Clear Brine Fluids
    Publication number: 20180223172
    Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines. Crystallization suppressant blends are also identified that allow for the preparation of high density clear brine fluids with lower viscosities.
    Type: Application
    Filed: April 3, 2018
    Publication date: August 9, 2018
    Inventors: Thomas G. Ray, Colin H. Keene, David J. Sikora, David W. Bartley, John Warner, Justin Whitfield, Dwight Tshudy, Joni P. Williams
  • HIGH DENSITY CLEAR BRINE FLUIDS
    Publication number: 20180016484
    Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines.
    Type: Application
    Filed: July 14, 2017
    Publication date: January 18, 2018
    Inventors: Thomas G. Ray, Colin H. Keene, David J. Sikora, David W. Bartley, John Warner, Justin Whitfield, Dwight Tshudy, Joni P. Williams
  • Preparation of tri-alkyl gallium or tri-alkyl indium compounds
    Patent number: 8513447
    Abstract: Trialkyl metal compounds, such as trialkyl gallium and indium compounds, are prepared in high yield and high purity by the addition of a trialkyl aluminum compound to a mixture prepared by adding a metal trihalide, e.g., GaCl3 or InCl3, and a halide salt of a monovalent metal to an ionic liquid such as a molten salt of the formula M[AlRnX(4-n)] wherein M is a monovalent metal such as Li, Na, K or Cs, R is an alkyl group X is a halide and n is a number from 1 to 3, typically at temperatures of from 75 to 160° C.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: August 20, 2013
    Assignee: Chemtura Corporation
    Inventors: Nicola Maggiarosa, Angelika Preetz, David J. Sikora
  • Preparation of Tri-Alkyl Gallium or Tri-Alkyl Indium Compounds
    Publication number: 20130197252
    Abstract: Trialkyl metal compounds, such as trialkyl gallium and indium compounds, are prepared in high yield and high purity by the addition of a trialkyl aluminum compound to a mixture prepared by adding a metal trihalide, e.g., GaCl3 or InCl3, and a halide salt of a monovalent metal to an ionic liquid such as a molten salt of the formula M[AlRn X(4-n)] wherein M is a monovalent metal such as Li, Na, K or Cs, R is an alkyl group X is a halide and n is a number from 1 to 3, typically at temperatures of from 75 to 160° C.
    Type: Application
    Filed: January 18, 2013
    Publication date: August 1, 2013
    Applicant: Chemtura Corporation
    Inventors: Nicola Maggiarosa, Angelika Preetz, David J. Sikora
  • Composition and method for inhibiting polymerization and polymer growth
    Patent number: 7943809
    Abstract: A method for inhibiting the premature polymerization and the polymer growth of ethylenically unsaturated monomers is disclosed wherein the method comprises adding to said monomers an effective amount of at least one hydrogen donor or electron acceptor. In a preferred embodiment, the hydrogen donor or electron acceptor is used in combination with a stable nitroxyl free radical.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: May 17, 2011
    Assignee: Chemtura Corporation
    Inventors: Brigitte Benage, Gerald J. Abruscato, David J. Sikora, Ruben S. Grewal
  • Alkyltin Sulfanyl Mercaptocarboxylates Having Terminal Thiol Groups
    Publication number: 20100280155
    Abstract: An alkyltin compound of specified formula which has utility as an excellent stabilizer for a halogen-containing resin. The alkyltin compound has from 1-3 terminal thiol groups.
    Type: Application
    Filed: July 13, 2010
    Publication date: November 4, 2010
    Applicant: GALATA CHEMICALS, LLC
    Inventors: Edward Krainer, Peter Frenkel, Mukund Shah, Perry Reed, David J. Sikora
  • Alkyltin sulfanyl mercaptocarboxylates having terminal thiol groups
    Patent number: 7767740
    Abstract: An alkyltin compound of specified formula which has utility as an excellent stabilizer for a halogen-containing resin. The alkyltin compound has from 1-3 terminal thiol groups.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: August 3, 2010
    Assignee: Galata Chemicals, LLC
    Inventors: Edward Krainer, Peter Frenkel, Mukund Shah, Perry Reed, David J. Sikora
  • COMPOSITION AND METHOD FOR INHIBITING POLYMERIZATION AND POLYMER GROWTH
    Publication number: 20100093897
    Abstract: A method for inhibiting the premature polymerization and the polymer growth of ethylenically unsaturated monomers is disclosed wherein the method comprises adding to said monomers an effective amount of at least one hydrogen donor or electron acceptor. In a preferred embodiment, the hydrogen donor or electron acceptor is used in combination with a stable nitroxyl free radical.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 15, 2010
    Applicant: Chemtura Corporation
    Inventors: Brigitte BENAGE, Gerald J. ABRUSCATO, David J. SIKORA, Ruben S. GREWAL
  • ?-crystalline polypropylenes
    Patent number: 7585909
    Abstract: Disclosed herein are p-urea phenyl derivatives of the formula: wherein R1 and R2 are independently selected hydrocarbyl groups. These derivatives are useful as haze reducing agents in propylene polymers and copolymers.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: September 8, 2009
    Assignee: Chemtura Corporation
    Inventors: Qinggao Ma, William A. Wortman, Abuzar Syed, Paul E. Stott, John M. Wefer, David J. Sikora
  • Urea phenyl derivatives and their use as polypropylene nucleating agents
    Patent number: 7572849
    Abstract: Disclosed herein are urea phenyl derivatives of the formula: wherein each R is an independently selected hydrocarbyl group and n is 2 or 3, and their use as nucleating agents for propylene polymers.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: August 11, 2009
    Assignee: Chemtura Corporation
    Inventors: Qinggao Ma, William A. Wortman, Jin-yun Wang, Huiling Ding, Roy Russell, Leigh C. Allen, Paul E. Stott, John Wefer, David J. Sikora
  • ?-Crystalline polypropylenes
    Patent number: 7569630
    Abstract: Disclosed herein are aromatic amide derivatives of the formulae: wherein X1 and X2 are independently selected from the group consisting of —OH, —OR, —OM, —NH2, and —NHR; M is a metal; and R, R1, and R2 are independently selected hydrocarbyl groups.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: August 4, 2009
    Assignee: Chemtura Corporation
    Inventors: Qinggao Ma, William A. Wortman, Abuzar Syed, Paul E. Stott, John M. Wefer, David J. Sikora
  • Lubricant compositions comprising an antioxidant blend
    Patent number: 7494960
    Abstract: A composition is disclosed that comprises a lubricant and at least a first antioxidant and a second antioxidant, the first antioxidant being a hindered phenolic and the second antioxidant being a thioether. Also disclosed is a method of increasing the oxidation stability of a lubricant comprising adding thereto at least a first antioxidant and a second antioxidant, the first antioxidant being a hindered phenolic and the second antioxidant being a thioether.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: February 24, 2009
    Assignee: Crompton Corporation
    Inventors: Cyril A. Migdal, David J. Sikora
  • Beta-crystalline polypropylenes
    Publication number: 20070293609
    Abstract: Disclosed herein are aromatic amide derivatives of the formulae: wherein X1 and X2 are independently selected from the group consisting of —OH, —OR, —OM, —NH2, and —NHR; M is a metal; and R, R1, and R2 are independently selected hydrocarbyl groups.
    Type: Application
    Filed: June 14, 2006
    Publication date: December 20, 2007
    Inventors: Qinggao Ma, William A. Wortman, Abuzar Syed, Paul E. Stott, John M. Wefer, David J. Sikora
  • Silane additives for lubricants and fuels
    Patent number: 6887835
    Abstract: Lubricants, especially lubricating oils, and fuels, especially hydrocarbon fuels, contain a class of anti-wear, anti-fatigue, and extreme pressure additives that are derived from silanes. The additives can be used as either partial or complete replacements for zinc dialkyldithiophosphates currently used in lubricants and fuels.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: May 3, 2005
    Assignee: Crompton Corporation
    Inventors: Cyril A. Migdal, Robert G. Rowland, David J. Sikora, Frederick D. Osterholtz