Patents by Inventor Gursu Culcu

Gursu Culcu 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: 20230001395
    Abstract: The present disclosure relates to tungsten complexes, catalyst systems including tungsten complexes, and polymerization processes to produce polycycloolefin polymers such as polycyclopentene polymers and polycyclooctene polymers.
    Type: Application
    Filed: October 9, 2020
    Publication date: January 5, 2023
    Inventors: Gursu Culcu, Alexander V. Zabula, Alan A. Galuska, David A. Cano
  • Publication number: 20220289879
    Abstract: This invention relates to polymers comprising: one or more that include 1) at least 11 wt % 4 substituted 1,4 hexadiene and less than 20 wt % 5-methyl-1,4-hexadiene, based upon the weight of the polymer, and 2) optionally, one or more olefins; and processes to produces such polymers using metallocene or post-metallocene catalyst compounds.
    Type: Application
    Filed: February 23, 2022
    Publication date: September 15, 2022
    Inventors: Alex E. Carpenter, Tzu-Pin Lin, Brian J. Rohde, Sarah J. Mattler, Nikola S. Lambic, Hsu Chiang, Peijun Jiang, Irene C. Cai, Gursu Culcu, Jarod M. Younker
  • Publication number: 20220274098
    Abstract: Methods for the hydroalkenylation of conjugated, 1,3-dienes using a diimine catalyst. The method comprises mixing a diene having at least five carbon atoms and an iron diimine complex at a temperature of about ?60° C. to about 23° C. to provide a catalyst solution; and introducing one or more alpha olefins at a pressure of at least 300 psig to obtain a product comprising the substituted diene monomer.
    Type: Application
    Filed: February 25, 2022
    Publication date: September 1, 2022
    Applicants: EXXONMOBIL CHEMICAL PATENTS INC., THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: ALEX E. CARPENTER, TZU-PIN LIN, IRENE C. CAI, GURSU CULCU, DANIELLE SINGLETON, PAUL J. CHIRIK, C. ROSE KENNEDY, MEGAN MOHADJER BEROMI
  • Publication number: 20210284763
    Abstract: This disclosure is generally directed to polymerization catalysts derived from 1,5-diazabicyclooctanes, catalyst systems utilizing such catalysts, and processes to polymerize alpha olefins therewith.
    Type: Application
    Filed: February 26, 2021
    Publication date: September 16, 2021
    Inventors: Gursu Culcu, Catherine A. Faler
  • Patent number: 11091567
    Abstract: The present disclosure relates to amido-benzoquinone transition metal complexes, catalyst systems including amido-benzoquinone transition metal complexes, and polymerization processes to produce polyolefin polymers such as polyethylene-based polymers and polypropylene-based polymers.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: August 17, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Tzu-Pin Lin, Lubin Luo, Alex E. Carpenter, Gursu Culcu, Catherine A. Faler, Irene C. Cai, John R. Hagadorn, Jo Ann M. Canich
  • Publication number: 20210121863
    Abstract: The present disclosure provides a catalyst system having a salan catalyst compound and borate or aluminate activators comprising cations having alkyl groups and methods for polymerizing olefins using such catalyst systems. In still another embodiment, the present disclosure provides a polymerization process comprising a) contacting one or more olefin monomers with a catalyst system comprising: i) an activator as described herein, ii) a catalyst compound as described herein, and iii) optional support.
    Type: Application
    Filed: October 27, 2020
    Publication date: April 29, 2021
    Inventors: Catherine A. Faler, Margaret T. Whalley, Gursu Culcu, Crisita Carmen H. Atienza
  • Publication number: 20210107927
    Abstract: The present disclosure provides catalyst compounds represented by Formula (I): where Q is OR13, SR13, NR13R14, PR13R14, or a heterocyclic ring; each R1-14 is independently hydrogen, C1-C40 hydrocarbyl, substituted C1-C40 hydrocarbyl, a heteroatom, or a heteroatom-containing group, or multiple R1-14 are joined together to form a C4-C62 cyclic, heterocyclic, or polycyclic ring structure, or combination(s) thereof; each X1 and X2 is independently C1-C20 hydrocarbyl, substituted C1-C20 hydrocarbyl, a heteroatom, or a heteroatom-containing group, or X1 and X2 join together to form a C4-C62 cyclic, heterocyclic, or polycyclic ring structure; and Y is a hydrocarbyl. The present disclosure also provides catalyst systems including an activator, a support, and a catalyst of the present disclosure. The present disclosure also provides polymerization processes including introducing olefin monomers to a catalyst system.
    Type: Application
    Filed: October 9, 2020
    Publication date: April 15, 2021
    Inventors: Gursu Culcu, Catherine A. Faler, Crisita Carmen H. Atienza, David A. Cano, John R. Hagadorn
  • Publication number: 20210061832
    Abstract: Phenoxyimine-based complexes, when activated, are suitable for catalyzing ring-opening metathesis polymerization (ROMP) reactions of cyclopentene and a comonomer under mild reaction conditions, for example, at reaction temperatures of about ?196° C. and about 70° C. in diluents like toluene. The use of such activated phenoxyimine-based complexes may favor polymer products with a high cis-content.
    Type: Application
    Filed: August 10, 2020
    Publication date: March 4, 2021
    Inventors: Gursu Culcu, Catherine A. Faler, David A. Cano
  • Publication number: 20200325254
    Abstract: The present disclosure relates to amido-benzoquinone transition metal complexes, catalyst systems including amido-benzoquinone transition metal complexes, and polymerization processes to produce polyolefin polymers such as polyethylene-based polymers and polypropylene-based polymers.
    Type: Application
    Filed: March 12, 2020
    Publication date: October 15, 2020
    Inventors: Tzu-Pin Lin, Lubin Luo, Alex E. Carpenter, Gursu Culcu, Catherine A. Faler, Irene C. Cai, John R. Hagadorn, Jo Ann M. Canich