Patents by Inventor Brian D. Warrick

Brian D. Warrick 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).

  • Patent number: 6261528
    Abstract: A metal hydride getter purifier operated at less than 350° C. to remove impurities such as carbon dioxide, carbon monoxide, nitrogen, oxygen and water to levels of the order of one ppb or less from hydrogen without creating greater than 10 ppb methane. A cryogenic stage after the getter stage may be used to ensure removal of methane from hydrogen.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: July 17, 2001
    Assignee: D.D.I. Limited
    Inventors: Giovanni Carrea, Brian D. Warrick
  • Patent number: 6017502
    Abstract: A metal hydride getter purifier operated at less than 350.degree. C. to remove impurities such as carbon dioxide, carbon monoxide, nitrogen, oxygen and water to levels of the order of one ppb or less from hydrogen without creating greater than 10 ppb methane. A cryogenic stage after the getter stage may be used to ensure removal of methane from hydrogen.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: January 25, 2000
    Assignee: D.D.I., Limited
    Inventors: Giovanni Carrea, Brian D. Warrick
  • Patent number: 5985007
    Abstract: A method and an apparatus for removing impurities from a noble gas or nitrogen utilizing a single purifier vessel having three zones. In the first zone, the gas is preheated to a temperature greater than 200.degree. C.; in the second zone, the preheated gas is contacted with a getter material at greater than 335.degree. C. for removal of impurities such as methane and other hydrocarbons, water, carbon monoxide, nitrogen, oxygen, and carbon dioxide; in the third zone, the gas is contacted with a second getter material at a temperature greater than 150.degree. C. for removal of hydrogen. Hot gas exiting the purifier vessel is passed through a recuperative heat exchanger where the hot exiting gas preheats in-coming gas before it enters the first zone of the purifier vessel.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: November 16, 1999
    Assignee: D.D.I. Ltd.
    Inventors: Giovanni Carrea, Brian D. Warrick
  • Patent number: 5902561
    Abstract: A two-stage process method for removal of impurities such carbon monoxide, carbon dioxide, oxygen, water, hydrogen, and methane from inert gases at ambient temperature (0.degree.-60.degree. C.). In the first stage the inert gas is contacted with a nickel catalyst, and in the second stage the inert gas is passed over a getter alloy. Purified gas exiting the second stage of the purifier contains less than one part per billion (ppb) levels of the impurities. The nickel catalyst and getter alloy are initially activated at elevated temperature. The catalyst and getter may be reactivated by heating and purging, and hydrogen previously removed from impure gas can be used in the reactivation process.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: May 11, 1999
    Assignee: D.D.I. Limited
    Inventors: Giovanni Carrea, Brian D. Warrick
  • 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