Patents by Inventor James P. Stokes

James P. Stokes 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: 20190112460
    Abstract: Described herein are polymer blends comprising (a) a propylene impact copolymer comprising a polypropylene component present in a continuous phase and a first elastomeric component present in a disperse phase; and (b) a second elastomeric component, and the interfacial tension between the second elastomeric component and the impact copolymer is at least 1.2 mN/m. The polymer blends of present invention provides improved gloss and impact properties.
    Type: Application
    Filed: September 12, 2018
    Publication date: April 18, 2019
    Inventors: Saifudin M. Abubakar, Dan Peng, Li Yuan, James P. Stokes
  • Patent number: 9079990
    Abstract: Copolymer are formed by polymerizing C4 to C7 isoolefin monomers and alkyl-styrene monomers. The method comprises first providing feed streams into a reactor. The various feed streams provide monomers, a polar diluent or polar diluent mixture, and a catalyst system into the reactor. In the reactor, the feed streams contact one another so that the monomers form a polymer in a stable slurry, wherein the amount of polymer in the slurry yields a slurry concentration greater than 22 wt %. The ratio of moles of polymer formed per mole initiator is in the range of 0.25 to 4.0 moles polymer per mole of initiator.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: July 14, 2015
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Timothy D. Shaffer, Deborah J. Davis, James P. Stokes
  • Patent number: 8598261
    Abstract: A process for producing a nanocomposite of a halogenated elastomer and an inorganic, exfoliated clay includes the in-situ protonation of a modifier, which may be an alkylamine, arylamine or an alkylarylamine. This process can be integrated with a polymer halogenation process. The nanocomposite so formed has improved air barrier properties and is suitable for use as a tire innerliner or innertube.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: December 3, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Weiqing Weng, James P. Stokes, Edmund J. Stachowski, III, Molly J. Upton, Robert N. Webb, Ramesh Varadaraj, Cornelius H. Brons, David J. Lohse
  • Publication number: 20110294924
    Abstract: Copolymer are formed by polymerizing C4 to C7 isoolefin monomers and alkyl-styrene monomers. The method comprises first providing feed streams into a reactor. The various feed streams provide monomers, a polar diluent or polar diluent mixture, and a catalyst system into the reactor. In the reactor, the feed streams contact one another so that the monomers form a polymer in a stable slurry, wherein the amount of polymer in the slurry yields a slurry concentration greater than 22 wt %. The ratio of moles of polymer formed per mole initiator is in the range of 0.25 to 4.0 moles polymer per mole of initiator.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 1, 2011
    Inventors: Timothy D. Shaffer, Deborah J. Davis, James P. Stokes
  • Publication number: 20110250372
    Abstract: A process for producing a nanocomposite of a halogenated elastomer and an inorganic, exfoliated clay includes the in-situ protonation of a modifier, which may be an alkylamine, arylamine or an alkylarylamine. This process can be integrated with a polymer halogenation process. The nanocomposite so formed has improved air barrier properties and is suitable for use as a tire innerliner or innertube.
    Type: Application
    Filed: October 14, 2008
    Publication date: October 13, 2011
    Inventors: Weiqing Weng, James P. Stokes, Edmund J. Stachowski III, Molly W. Upton, Robert N. Webb, Ramesh Varadaraj, Cornelius H. Brons, David J. Lohse
  • Patent number: 7906600
    Abstract: The present invention provides an elastomeric composition processable in a curable, filled rubber formulation. The composition comprises a halogenated interpolymer of a C4 to C7 isoolefin and from 3 to 20 weight percent alkylstyrene and comprising from 0.2 to 2 mole percent haloalkylstyrene, a Mooney viscosity less than 27, a number average molecular weight less than 270,000, a weight average molecular weight less than 470,000, a z-average molecular weight less than 700,000, and a branching index (g?) from 0.4 to 1.1. Also disclosed are a method of making a cured, filled rubber article, comprising compounding the elastomeric composition with filler and curative, processing the compounded composition to form a shape of the article, and curing the composition to obtain the article in the formed shape, as well as a tire comprising an innerliner made by the method.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: March 15, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Walter H. Waddell, Dirk F. Rouckhout, James P. Stokes, Arthur J. Sullivan, Donald S. Tracey, Robert N. Webb
  • Patent number: 7825181
    Abstract: The present invention relates to modified layered fillers made from layered fillers and modifying agents and processes to produce the same. The invention also relates to nanocomposite compositions made from these modified layered fillers and elastomers, and processes to produce the same, and their use in articles.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: November 2, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Caiguo Gong, Weiqing Weng, Mun Fu Tse, Anthony J. Dias, James P. Stokes, Alan A. Galuska, Beverly J. Poole, Carmen Neagu, Kriss R. Karp, Molly W. Johnston
  • Patent number: 7799956
    Abstract: A process for producing phenol and methyl ethyl ketone comprises contacting benzene with a C4 alkylating agent under alkylation conditions with catalyst comprising zeolite beta or a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom to produce an alkylation effluent comprising sec-butylbenzene. The sec-butylbenzene is then oxidized to produce a hydroperoxide and the hydroperoxide is decomposed to produce phenol and methyl ethyl ketone.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: September 21, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jane Chi-ya Cheng, John S. Buchanan, Doron Levin, Michael A. Steckel, Jihad M. Dakka, James P. Stokes, John L. Robbins, Jon E. Stanat, Charles M. Smith, José G. Santiesteban
  • Publication number: 20080139730
    Abstract: The present invention provides an elastomeric composition processable in a curable, filled rubber formulation. The composition comprises a halogenated interpolymer of a C4 to C7 isoolefin and from 3 to 20 weight percent alkylstyrene and comprising from 0.2 to 2 mole percent haloalkylstyrene, a Mooney viscosity less than 27, a number average molecular weight less than 270,000, a weight average molecular weight less than 470,000, a z-average molecular weight less than 700,000, and a branching index (g?) from 0.4 to 1.1. Also disclosed are a method of making a cured, filled rubber article, comprising compounding the elastomeric composition with filler and curative, processing the compounded composition to form a shape of the article, and curing the composition to obtain the article in the formed shape, as well as a tire comprising an innerliner made by the method.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 12, 2008
    Inventors: Walter H. Waddell, Dirk F. Rouckhout, James P. Stokes, J. Arthur Sullivan, Donald S. Tracey, N. Webb Robert
  • Patent number: 6681857
    Abstract: A method for recovering oil in a reservoir by generating chemical microexplosions in the reservoir. The invention treats the hydrocarbon-bearing reservoir by decomposing in situ at least one PEH-3CO, thereby generating heat, shock, and CO2. A preferred method comprises the steps of depositing PEH-3CO into the formation and depositing an acid into the formation to cause the PEH-3CO to decompose and generate heat and gas.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: January 27, 2004
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Jacob J. Habeeb, James P. Stokes, Martin L. Gorbaty
  • Publication number: 20020139531
    Abstract: A method for recovering oil in a reservoir by generating chemical microexplosions in the reservoir. The invention treats the hydrocarbon-bearing reservoir by decomposing in situ at least one PEH-3CO, thereby generating heat, shock, and CO2. A preferred method comprises the steps of depositing PEH-3CO into the formation and depositing an acid into the formation to cause the PEH-3CO to decompose and generate heat and gas.
    Type: Application
    Filed: January 15, 2002
    Publication date: October 3, 2002
    Inventors: Jacob J. Habeeb, James P. Stokes, Martin L. Gorbaty
  • Patent number: 6310010
    Abstract: Concentrates for lubricating oil compositions are prepared by mixing at elevated temperature: (i) at least one high molecular weight ashless dispersant; (ii) at least one oil-soluble overbased metal detergent; and (iii) at least one surface-active agent comprising a low molecular weight hydroxyl or amine group.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: October 30, 2001
    Assignee: Exxon Chemicals Patents INC
    Inventors: Gary Higton, Jacob Emert, Robert A. Wilkinson, Isabel P. MacDonald, Karl J. Van Driesen, Salvatore Rea, James P. Stokes, Andrew J. D. Ritchie
  • Patent number: 6172015
    Abstract: Polar monomer-containing copolymers derived from at least one &agr;, &bgr; unsaturated carbonyl compound, such as alkyl acrylates and one or more olefins, such olefins including ethylene and C3-C20 &agr;-olefins such as propylene and 1-butene, which copolymers have (a) an average ethylene sequence length, ESL, of from about 1.0 to less than about 3.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: January 9, 2001
    Assignee: Exxon Chemical Patents, Inc
    Inventors: Jacob Emert, Albert Rossi, David E. Gindelberger, Jon E. Stanat, James P. Stokes, Jaimes Sher
  • Patent number: 6066603
    Abstract: Polar monomer-containing copolymers derived from at least one .alpha., .beta. unsaturated carbonyl compound, such as alkyl acrylates and one or more olefins, such olefins including ethylene and C.sub.3 -C.sub.20 .alpha.-olefins such as propylene and 1-butene, which copolymers have (a) an average ethylene sequence length, ESL, of from about 1.0 to less than about 3.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: May 23, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jacob Emert, Albert Rossi, David E. Gindelberger, Jon E. Stanat, James P. Stokes, Jaimes Sher
  • Patent number: 5936041
    Abstract: The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: August 10, 1999
    Assignee: Exxon Chemical Patents Inc
    Inventors: William B. Diana, Joseph V. Cusumano, Keith R. Gorda, Jacob Emert, William B. Eckstrom, David C. Dankworth, Jon E. Stanat, James P. Stokes
  • Patent number: 5804667
    Abstract: The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 8, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: William B. Diana, Joseph V. Cusumano, Keith R. Gorda, Jacob Emert, William B. Eckstrom, David C. Dankworth, Jon E. Stanat, James P. Stokes
  • Patent number: 5672573
    Abstract: Processes for preparing amidoamine products derived from hydrocarbon polymers containing carboxylic acid, thioacid, ester or thioester functional groups are disclosed. More particularly, a process is disclosed which comprises the steps of:(A) reacting (i) a hydrocarbon polymer functionalized to contain functional groups of formula --CO--Y--R.sup.3, the hydrocarbon polymer having a number average molecular weight of at least about 500 prior to functionalization, wherein Y is O or S, R.sup.3 is hydrogen, hydrocarbyl, or substituted hydrocarbyl and wherein at least 50 mole % of the functional groups are attached to a tertiary carbon atom of the polymer, with (ii) a volatile amine containing at least two reactive amino groups under conditions effective to amidate at least a portion of the --CO--Y--R.sup.3 functional groups and form a first amidoamine adduct containing at least one reactive amino group; and(B) reacting the first amidoamine adduct with an .alpha.,.beta.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: September 30, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Antonio Gutierrez, James P. Stokes
  • Patent number: 5643859
    Abstract: A dispersant derivatized from a functionalized hydrocarbon and a polyamine having one primary amine and 1-10, preferably 3-8 secondary or tertiary amines; preferably where said functionalized hydrocarbon is a Koch-derived hydrocarbon.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: July 1, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Antonio Gutierrez, Jacob I. Emert, James P. Stokes, Warren A. Thaler, William D. Diana, Keith R. Gorda, William B. Eckstrom, David C. Dankworth, Joseph V. Cusumano
  • Patent number: 5557268
    Abstract: The present invention is a system and method for identifying a vehicle for the purpose of displaying diagnostic information to the driver. Each vehicle includes a transponder that transmits an encoded character sequence that is unique to that vehicle. In this way vehicle diagnostic measurements made at the establishment entrance can be associated with the vehicle, and displayed to the customer when the vehicle is recognized again at a service area.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: September 17, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Gerard J. Hughes, Leonard J. Duncan, David P. Goshorn, James P. Stokes
  • Patent number: 4636737
    Abstract: The present invention is a method and a device for the frequency modulation and/or demodulation of a signal applied to materials that carry sliding charge density waves. A particular example of such a material is orthorhombic TaS.sub.3 that acts as a frequency modulator.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: January 13, 1987
    Assignee: Exxon Research and Engineering Company
    Inventors: Sabyasachi Bhattacharya, Aaron N. Bloch, James P. Stokes