Patents by Inventor Ramachandran Kirshnamurthy

Ramachandran Kirshnamurthy 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).

  • Method and apparatus of producing carbon dioxide in high yields from low concentration carbon dioxide feeds
    Patent number: 4969338
    Abstract: A process for producing substantially pure liquid carbon dioxide from a carbon dioxide feed containing about 35 to about 98% by volume of carbon dioxide wherein a waste stream containing carbon dioxide is separated from contaminants in a pressure swing adsorption apparatus and then recycled to the carbon dioxide feed, and a system for recovering spent carbon dioxide from a refrigeration system using liquid carbon dioxide as a freezing agent.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: November 13, 1990
    Assignee: The BOC Group, Inc.
    Inventors: Ramachandran Kirshnamurthy, Donald L. MacLean
  • Method and apparatus of producing carbon dioxide in high yields from low concentration carbon dioxide feeds
    Patent number: 4952223
    Abstract: A process for producing substantially pure liquid carbon dioxide from a carbon dioxide feed containing about 35 to about 98% by volume of carbon dioxide wherein a waste stream containing carbon dioxide is separated from contaminants in a pressure swing adsorption apparatus and then recycled to the carbon dioxide feed, and a system for recovering spent carbon dioxide from a refrigeration system using liquid carbon dioxide as a freezing agent.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: August 28, 1990
    Assignee: The BOC Group, Inc.
    Inventors: Ramachandran Kirshnamurthy, Donald L. MacLean