Patents by Inventor Carolyn Lehman

Carolyn Lehman 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: 9783621
    Abstract: A polyolefin manufacturing system and method including polymerizing olefin in a first reactor to form a polyolefin, transferring the polyolefin to a second reactor, polymerizing olefin in the second reactor, and discharging a product polyolefin from the second reactor. The system and method including operating the first reactor with a first reactor pressure relief system and the second reactor with a second reactor pressure relief system, both pressure relief systems to discharge to a flare system, and wherein a relief instrumented system (RIS) is configured to direct at least one process interlock that mitigates an excess reaction scenario as an overpressure relief scenario.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: October 10, 2017
    Assignee: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Thanh T. Nguyen, Ralph Romig, Carolyn Lehman, Joel Mutchler
  • Publication number: 20160159938
    Abstract: A polyolefin manufacturing system and method including polymerizing olefin in a first reactor to form a polyolefin, transferring the polyolefin to a second reactor, polymerizing olefin in the second reactor, and discharging a product polyolefin from the second reactor. The system and method including operating the first reactor with a first reactor pressure relief system and the second reactor with a second reactor pressure relief system, both pressure relief systems to discharge to a flare system, and wherein a relief instrumented system (RIS) is configured to direct at least one process interlock that mitigates an excess reaction scenario as an overpressure relief scenario.
    Type: Application
    Filed: February 16, 2016
    Publication date: June 9, 2016
    Inventors: Thanh T. Nguyen, Ralph Romig, Carolyn Lehman, Joel Mutchler
  • Patent number: 9295964
    Abstract: A polyolefin manufacturing system and method including polymerizing olefin in a first reactor to form a polyolefin, transferring the polyolefin to a second reactor, polymerizing olefin in the second reactor, and discharging a product polyolefin from the second reactor. The system and method including operating the first reactor with a first reactor pressure relief system and the second reactor with a second reactor pressure relief system, both pressure relief systems to discharge to a flare system, and wherein a relief instrumented system (RIS) is configured to direct at least one process interlock that mitigates an excess reaction scenario as an overpressure relief scenario.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: March 29, 2016
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Thanh T. Nguyen, Ralph Romig, Carolyn Lehman, Joel Mutchler
  • Publication number: 20150080533
    Abstract: A polyolefin manufacturing system and method including polymerizing olefin in a first reactor to form a polyolefin, transferring the polyolefin to a second reactor, polymerizing olefin in the second reactor, and discharging a product polyolefin from the second reactor. The system and method including operating the first reactor with a first reactor pressure relief system and the second reactor with a second reactor pressure relief system, both pressure relief systems to discharge to a flare system, and wherein a relief instrumented system (RIS) is configured to direct at least one process interlock that mitigates an excess reaction scenario as an overpressure relief scenario.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 19, 2015
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY, LP
    Inventors: Thanh T. Nguyen, Ralph Romig, Carolyn Lehman, Joel Mutchler