Patents by Inventor Lewis J. Wickman

Lewis J. Wickman 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).

  • Specialty gas purification system
    Patent number: 5833738
    Abstract: A method and apparatus are disclosed showing a system for continuous purification of bulk source specialty gases to less than 10 part per billion levels. Corrosive and non-corrosive specialty gases are purified using this system. Depending on whether corrosive or non-corrosive gases are being purified and the contaminants of concern, the purification beds contain an absorber and/or getter. A dual bed system allows one bed to purify at ambient temperatures while a second bed undergoes regeneration, providing continuous purification for a bulk source specialty gas.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: November 10, 1998
    Assignee: D.D.I. Ltd.
    Inventors: Giovanni Carrea, Brian D. Warrick, Lewis J. Wickman