Patents by Inventor Robert Gmelin

Robert Gmelin 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).

  • Economical air separator
    Patent number: 5228888
    Abstract: A process for producing a nitrogen-enriched product in improved yield and specific product comprising passing air through a bed of crushed zeolite having a particle size of 10 to 40 mesh, thereby adsorbing oxygen and producing the enriched nitrogen product.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: July 20, 1993
    Assignee: The BOC Group, Inc.
    Inventors: Robert Gmelin, Alberto LaCava