Patents by Inventor Donna J. Crowther

Donna J. Crowther 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).

  • Patent number: 10538604
    Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: January 21, 2020
    Assignee: Univation Technologies, LLC
    Inventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
  • Publication number: 20200002444
    Abstract: This invention relates to novel transition metal catalyst compounds comprising four oxygen atoms bonded to a transition metal where two of the oxygen groups are bond to the metal by dative bonds, catalyst systems comprising such and polymerization processes using such.
    Type: Application
    Filed: June 28, 2017
    Publication date: January 2, 2020
    Inventors: Donna J. Crowther, Hua Zhou, Jacqueline A. Lovell
  • Publication number: 20190352436
    Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.
    Type: Application
    Filed: July 30, 2019
    Publication date: November 21, 2019
    Applicant: Univation Technologies, LLC
    Inventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
  • Publication number: 20190144580
    Abstract: Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).
    Type: Application
    Filed: November 14, 2018
    Publication date: May 16, 2019
    Inventors: Donna J. Crowther, Timothy M. Boller, Richard B. Pannell, Jeanette M. Diop, Wen Li
  • Publication number: 20190144579
    Abstract: Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).
    Type: Application
    Filed: November 14, 2018
    Publication date: May 16, 2019
    Inventors: Donna J. Crowther, Timothy M. Boller, Richard B. Pannell, Jeanette M. Diop, Wen Li
  • Publication number: 20190144578
    Abstract: Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).
    Type: Application
    Filed: November 14, 2018
    Publication date: May 16, 2019
    Inventors: Donna J. Crowther, Timothy M. Boller, Richard B. Pannell, Jeanette M. Diop, Wen Li
  • Patent number: 10280234
    Abstract: This invention relates to novel transition metal catalyst compounds comprising four oxygen atoms bonded to a transition metal where two of the oxygen groups are bonded to the metal by dative bonds and a silyl or germyl bridge, catalyst systems comprising such, and polymerization processes using such.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: May 7, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Donna J. Crowther, Hua Zhou, Jacqueline A. Lovell
  • Patent number: 10246542
    Abstract: An atactic polypropylene comb-block polyolefin comprising two blocks including a polyolefin backbone and atactic polypropylene combs pendant to the backbone having a weight average molecular weight of at least 8000 g/mole and a crystallinity of less than 20%, where the atactic polypropylene comb-block polyolefin has comb number of at least 2. The atactic polypropylene comb-block polyolefin is made by contacting at a temperature within a range from 20 to 70° C. propylene with a first metallocene precursor to form vinyl-terminated atactic polypropylene to form vinyl-terminated atactic polypropylene, then contacting at a temperature within a range from 40 to 150° C. the vinyl-terminated atactic polypropylene with ethylene, propylene, or both and a second metallocene precursor to form the backbone.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: April 2, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Andy H. Tsou, George Rodriguez, Carlos R. Lopez-Barron, Donna J. Crowther, Hillary L. Bradshaw, Antonios K. Doufas
  • Publication number: 20180327524
    Abstract: A catalyst system including two or more metallocene catalysts and processes for using the same to produce polyolefin polymer compositions are provided. The polyolefin polymer compositions have a good balance of a melt index ratio and normalized melt strength.
    Type: Application
    Filed: April 11, 2018
    Publication date: November 15, 2018
    Inventors: Ching-Tai Lue, Phillip T. Matsunaga, Donna J. Crowther
  • Publication number: 20180282443
    Abstract: Unsaturated and hydrogenated polyalpha-olefin products can be made with a high selectivity toward vinylidenes and tri-substituted vinylenes combined, a high selectivity toward vinylidenes, and a low selectivity toward 1,2-di-substituted vinylenes by using a catalyst system comprising a metallocene compound having the following structure in the polymerization reaction:
    Type: Application
    Filed: March 15, 2018
    Publication date: October 4, 2018
    Inventors: Donna J. Crowther, Patrick C. Chen, Jacqueline A. Lovell, Md Safatul Islam
  • Publication number: 20180282359
    Abstract: Unsaturated and hydrogenated polyalpha-olefin products can be made with a high selectivity toward vinylidenes and tri-substituted vinylenes combined, a high selectivity toward vinylidenes, and a low selectivity toward 1,2-di-substituted vinylenes by using a catalyst system comprising a metallocene compound having the following structure in the polymerization reaction:
    Type: Application
    Filed: March 15, 2018
    Publication date: October 4, 2018
    Inventors: Donna J. Crowther, Hua Zhou
  • Patent number: 9982081
    Abstract: A process for making a branched cyclic olefin copolymer (bCOC), and the bCOC therefrom, comprising combining at a temperature within a range from 60° C. to 140° C. a catalyst precursor and an activator with a feed comprising ethylene and at least one cyclic olefin; where the catalyst precursor is selected from the group consisting of CS-symmetric Group 4 metallocenes comprising any two ligands selected from cyclopentadienyl and ligands isolobal to the cyclopentadienyl group. The resulting bCOC is desirably semi-crystalline and useful in such articles as tubing, thermoformed and foamed articles.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: May 29, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yong Yang, Donna J. Crowther, Jacqueline A. Lovell
  • Publication number: 20180134817
    Abstract: This invention relates to novel transition metal catalyst compounds comprising four oxygen atoms bonded to a transition metal where two of the oxygen groups are bonded to the metal by dative bonds and a silyl or germyl bridge, catalyst systems comprising such, and polymerization processes using such.
    Type: Application
    Filed: October 12, 2017
    Publication date: May 17, 2018
    Inventors: Donna J. Crowther, Hua Zhou, Jacqueline A. Lovell
  • Publication number: 20180094088
    Abstract: In at least one embodiment, a catalyst compound is represented by Formula (I): where M is a group 4 metal. Each of R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, and R14 is independently hydrogen, or a linear or branched C1-C50 substituted or unsubstituted hydrocarbyl, halocarbyl or silylcarbyl. At least one of R1 and R3 is not hydrogen. Each X is independently a halide or C1-C50 substituted or unsubstituted hydrocarbyl, hydride, amide, alkoxide, sulfide, phosphide, halide, diene, amine, phosphine, ether, or a combination thereof, or two Xs are joined together to form a metallocycle ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene.
    Type: Application
    Filed: September 15, 2017
    Publication date: April 5, 2018
    Inventors: Donna J. Crowther, Laughlin G. McCullough, Jacqueline A. Lovell
  • Publication number: 20180079838
    Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.
    Type: Application
    Filed: April 14, 2016
    Publication date: March 22, 2018
    Applicant: Univation Technologies, LLC
    Inventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
  • Patent number: 9815926
    Abstract: Provided herein are ethylene copolymers, methods for making such copolymers, and compositions made from such copolymers. The ethylene copolymers have 70 wt. % to 85 wt. % of units derived from ethylene and at least 12 wt. % of units derived from at least one ?-olefin having 3 to 20 carbon atoms. The copolymers preferably further have a weight-average molecular weight (Mw) ranging from about 50,000 to about 200,000 g/mol, melting point of at least 100° C., ratio of Mw/Mn of about 1.5 to about 3.5, a content of group 4 metals of no more than 25 ppm, and a ratio of wt ppm Group 4 metals/wt ppm Group 5 metals of at least 3. Such copolymers may be particularly useful as viscosity modifiers for lubricating oil compositions.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: November 14, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Rainer Kolb, Donna J. Crowther, Peijun Jiang
  • Patent number: 9777231
    Abstract: A compound useful for reducing fouling in a hydrocarbon refining process is provided. A method for preparing the compound includes hydrohalogenating a polymer having a vinyl chain end to obtain a halogen-containing terminal group, and reacting the terminal group with a polyamine. Methods of using the compound and compositions thereof are also provided.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: October 3, 2017
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Man Kit Ng, Donna J. Crowther, Glen Barry Brons, Hong Cheng, Patrick Brant, Clarence Chase
  • Publication number: 20170253701
    Abstract: Described herein is a comb-star poly(siloxane-polyolefin) comprising the reaction product of at least vinyl-terminated macromer and functional-poly(dialkylsiloxanes) comprising 2 or more functional groups, wherein the comb-star poly(siloxane-polyolefin) has the following features: a g?(vis avg) of less than 0.80; a comb number of 2 or 3 or 4 to 30 or 40 or 50 or 100 or more; and a number average molecular weight (Mn) within the range of from 25,000 g/mole to 500,000 g/mole.
    Type: Application
    Filed: June 30, 2014
    Publication date: September 7, 2017
    Applicant: Exxonmobile Chemical Patents Inc.
    Inventors: Andy H. Tsou, Donna J. Crowther, Man Kit Ng, Tabassumul Haque, Hong Cheng, Patrick Brant, Martin N. Webster, Yong Yang, Liehpao O. Farng, Rahul R. Kulkarni
  • Patent number: 9744500
    Abstract: A multilayer microporous membrane including polymer and having a shutdown temperature of ?130.5° C. and a storage stability of 0.3V or less.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: August 29, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Donna J. Crowther, Patrick Brant, Kazuhiro Yamada
  • Patent number: 9745528
    Abstract: A compound useful for reducing fouling in a hydrocarbon refining process is provided. A method for preparing the compound includes functionalizing a polymer having a vinyl chain end to obtain a terminal group having one or more anhydride units, and reacting the anhydride units with a polyamine. Methods of using the compound and compositions thereof are also provided.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: August 29, 2017
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Man Kit Ng, Glen B. Brons, Matthew W. Holtcamp, Donna J. Crowther, Patrick Brant, Hong Cheng, Clarence Chase