Patents by Inventor Robert C. Gmelin

Robert C. 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).

  • Pressure swing adsorption method for separating gaseous mixtures
    Patent number: 5176722
    Abstract: The present invention is a method for separating a gaseous mixture to produce an enriched gas having a predetermined purity which comprises the steps of (a) passing the gaseous mixture into a first adsorption bed at an adsorption pressure in the range from about 15 psig to about 500 psig, (b) withdrawing enriched gas from the first adsorption bed and passing the enriched gas into a product reservoir, (c) when the purity of the enriched gas from the first adsorption bed drops below the predetermined purity thereby becoming lean gas, passing the lean gas from the first adsorption bed into a second adsorption bed to substantially equalize the pressure of the bed, (d) stopping the flow of lean gas from the first adsorption bed and evacuating the first adsorption bed while purging the first adsorption bed by passing enriched gas from the product reservior into the first adsorption bed, (e) further pressurizing the second adsorption bed by passing enriched gas from the product reservoir into the second adsorption b
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: January 5, 1993
    Assignee: The BOC Group, Inc.
    Inventors: Norberto C. Lemcoff, Robert C. Gmelin