Patents by Inventor Richard John McNab

Richard John McNab 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: 5979177
    Abstract: A refrigeration system for an ethylene plant uses a low pressure demethanizer and a binary refrigerant comprising a mixture of methane and ethylene or methane and ethane. The refrigeration composition may be constant throughout the system or separators may be used to divide the refrigerant into a methane-rich binary refrigerant and an ethylene- or ethane-rich binary refrigerant.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: November 9, 1999
    Assignee: ABB Lummus Global Inc.
    Inventors: Charles Sumner, Vitus Tuan Wei, John J. Crawford, Stephen J. Stanley, Richard John McNab