Patents by Inventor Malcolm Pettigrew

Malcolm Pettigrew 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).

  • Separating olefin streams
    Patent number: 8338656
    Abstract: This invention pertains to separating an olefin stream into at least two olefin streams. The olefin stream that is to be separated is low in diene composition, which allows the olefin stream to be compressed at a relatively high temperature without causing fouling problems in the compressor system. The invention is particularly relevant to separating olefins obtained from an oxygen to olefins unit.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: December 25, 2012
    Assignees: Lummus Technology Inc., ExxonMobil Chemical Patents Inc.
    Inventors: David Ritchie Lumgair, Michael Peter Nicoletti, Ram Mallik, Wadie Malaty, Malcolm Pettigrew
  • SEPARATING OLEFIN STREAMS
    Publication number: 20100292521
    Abstract: This invention pertains to separating an olefin stream into at least two olefin streams. The olefin stream that is to be separated is low in diene composition, which allows the olefin stream to be compressed at a relatively high temperature without causing fouling problems in the compressor system. The invention is particularly relevant to separating olefins obtained from an oxygen to olefins unit.
    Type: Application
    Filed: October 1, 2007
    Publication date: November 18, 2010
    Applicants: LUMMUS TECHNOLOGY INC., EXXON MOBIL CHEMICAL COMPANY
    Inventors: David Ritchie Lumgair, Michael Peter Nicoletti, Ram Mallik, Wadie Malaty, Malcolm Pettigrew