Patents by Inventor Nellie Cilen

Nellie Cilen 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).

  • Ultra pure liquid oxygen cycle
    Patent number: 4869741
    Abstract: The present invention is a process for the production of 99.999+% pure oxygen. The process comprises a cryogenic distillation system which removes impurities from oxygen. The process can be operated independently of an air separation unit by using an external source to provide reboil and condensing duties for the distillation column.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: September 26, 1989
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Roger M. McGuinness, Nellie Cilen