Patents by Inventor Sateesh K. Rajput

Sateesh K. Rajput 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).

  • Processes for reducing the loss of catalyst activity of a Ziegler-Natta catalyst
    Patent number: 11311870
    Abstract: A process for reducing the loss of catalyst activity of a Ziegler-Natta catalyst is provided. The process includes preparing a Ziegler-Natta (ZN) catalyst by contacting the ZN catalyst with at least one aluminum alkyl compound to produce a reduced ZN catalyst and storing and/or transporting the reduced ZN catalyst for at least 20 days at a temperature of 25° C. or less. The reduced ZN catalyst may be used for polymerizing polyolefin polymers.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: April 26, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Edward F. Smith, George A. Vaughan, Michael Awe, James R. Sollen, Ronald N. Cooke, Sateesh K. Rajput, Ahmed H. Ali
  • Processes for Reducing the Loss of Catalyst Activity of a Ziegler-Natta Catalyst
    Publication number: 20200030785
    Abstract: A process for reducing the loss of catalyst activity of a Ziegler-Natta catalyst is provided. The process includes preparing a Ziegler-Natta (ZN) catalyst by contacting the ZN catalyst with at least one aluminum alkyl compound to produce a reduced ZN catalyst and storing and/or transporting the reduced ZN catalyst for at least 20 days at a temperature of 25° C. or less. The reduced ZN catalyst may be used for polymerizing polyolefin polymers.
    Type: Application
    Filed: December 13, 2017
    Publication date: January 30, 2020
    Inventors: Edward F. Smith, George A. Vaughan, Michael Awe, James R. Sollen, Ronald N. Cooke, Sateesh K. Rajput, Ahmed H. Ali