Patents by Inventor Patrick L. Bradley

Patrick L. Bradley 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).

  • Polyisobutylene prepared at high velocity and circulation rate
    Patent number: 9266980
    Abstract: A method of making a polyisobutylene polymer in a recirculating loop reactor with one or more reaction tubes in contact with a heat transfer medium includes controlling the delta P and polymerization reaction to provide a linear velocity of the reaction mixture of at least 11 ft/sec in the one or more tubes of the loop reactor and/or controlling the delta P and polymerization reaction of steps (b) and (c) to provide a recirculation ratio of the recirculation rate to the feed rate of at least 30:1. Typically, the process utilizes a recirculating pump operating at a pressure differential of from 35 psi to 70 psi.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: February 23, 2016
    Assignee: TPC Group LLC
    Inventors: Sohel K. Shaikh, Alfred Chiu, Patrick L. Bradley, Gilbert D. Valdez, Peggy J. Macatangay
  • Polyisobutylene Prepared at High Velocity and Circulation Rate
    Publication number: 20150197584
    Abstract: A method of making a polyisobutylene polymer in a recirculating loop reactor with one or more reaction tubes in contact with a heat transfer medium includes controlling the delta P and polymerization reaction to provide a linear velocity of the reaction mixture of at least 11 ft/sec in the one or more tubes of the loop reactor and/or controlling the delta P and polymerization reaction of steps (b) and (c) to provide a recirculation ratio of the recirculation rate to the feed rate of at least 30:1. Typically, the process utilizes a recirculating pump operating at a at a pressure differential of from 35 psi to 70 psi.
    Type: Application
    Filed: December 10, 2014
    Publication date: July 16, 2015
    Inventors: Sohel K. Shaikh, Alfred Chiu, Patrick L. Bradley, Gilbert D. Valdez, Peggy J. Macatangay
  • Polyisobutylene prepared at high velocity and circulation rate
    Patent number: 8946361
    Abstract: A method of making a polyisobutylene polymer in a recirculating loop reactor with one or more reaction tubes in contact with a heat transfer medium includes controlling the delta P and polymerization reaction to provide a linear velocity of the reaction mixture of at least 11 ft/sec in the one or more tubes of the loop reactor and/or controlling the delta P and polymerization reaction of steps (b) and (c) to provide a recirculation ratio of the recirculation rate to the feed rate of at least 30:1. Typically, the process utilizes a recirculating pump operating at a at a pressure differential of from 35 psi to 70 psi.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: February 3, 2015
    Assignee: TPC Group LLC
    Inventors: Sohel K. Shaikh, Alfred Chiu, Patrick L. Bradley, Gilbert D. Valdez, Peggy J. Macatangay
  • Polyisobutylene Prepared at High Velocity and Circulation Rate
    Publication number: 20140235801
    Abstract: A method of making a polyisobutylene polymer in a recirculating loop reactor with one or more reaction tubes in contact with a heat transfer medium includes controlling the delta P and polymerization reaction to provide a linear velocity of the reaction mixture of at least 11 ft/sec in the one or more tubes of the loop reactor and/or controlling the delta P and polymerization reaction of steps (b) and (c) to provide a recirculation ratio of the recirculation rate to the feed rate of at least 30:1. Typically, the process utilizes a recirculating pump operating at a pressure differential of from 35 psi to 70 psi.
    Type: Application
    Filed: October 10, 2012
    Publication date: August 21, 2014
    Inventors: Sohel K. Shaikh, Alfred Chiu, Patrick L. Bradley, Gilbert D. Valdez, Peggy J. Macatangay