Patents by Inventor Hai Du

Hai Du 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).

  • Publication number: 20160084571
    Abstract: The invention relates to a process for removing oxygen from liquid argon using a TSA (temperature swing adsorption) cyclical process that includes cooling an adsorbent bed to sustain argon in a liquid phase; supplying the adsorbent bed with a liquid argon feed that is contaminated with oxygen and purifying the liquid argon thereby producing an argon product with less oxygen contaminant than is in the initial liquid argon feed; draining the purified residual liquid argon product and sending purified argon out of the adsorbent bed. Regeneration of specially prepared adsorbent allows the adsorbent bed to warm up to temperatures that preclude the use of requiring either vacuum or evacuation of adsorbent from the bed.
    Type: Application
    Filed: November 23, 2015
    Publication date: March 24, 2016
    Inventors: PERSEFONI E. KECHAGIA, Neil A. Stephenson, Philip A. Barrett, Hai Du, Steven J. Pontonio
  • Patent number: 9222727
    Abstract: The invention relates to a process for removing oxygen from liquid argon using a TSA (temperature swing adsorption) cyclical process that includes cooling an adsorbent bed to sustain argon in a liquid phase; supplying the adsorbent bed with a liquid argon feed that is contaminated with oxygen and purifying the liquid argon thereby producing an argon product with less oxygen contaminant than is in the initial liquid argon feed; draining the purified residual liquid argon product and sending purified argon out of the adsorbent bed. Regeneration of specially prepared adsorbent allows the adsorbent bed to warm up to temperatures that preclude the use of requiring either vacuum or evacuation of adsorbent from the bed.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: December 29, 2015
    Assignee: Praxair Technology, Inc.
    Inventors: Persefoni E. Kechagia, Neil A. Stephenson, Philip A. Barrett, Hai Du, Steven J. Pontonio
  • Publication number: 20140245781
    Abstract: The invention relates to a process for removing oxygen from liquid argon using a TSA (temperature swing adsorption) cyclical process that includes cooling an adsorbent bed to sustain argon in a liquid phase; supplying the adsorbent bed with a liquid argon feed that is contaminated with oxygen and purifying the liquid argon thereby producing an argon product with less oxygen contaminant than is in the initial liquid argon feed; draining the purified residual liquid argon product and sending purified argon out of the adsorbent bed. Regeneration of specially prepared adsorbent allows the adsorbent bed to warm up to temperatures that preclude the use of requiring either vacuum or evacuation of adsorbent from the bed.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 4, 2014
    Inventors: Persefoni E. Kechagia, Neil A. Stephenson, Philip A. Barrett, Hai Du, Steven J. Pontonio
  • Publication number: 20100205711
    Abstract: A unitary knew pad fabricated from closed cell resin includes center cup section and integral lateral side connection straps located at the bottom side of the cup section for placement about the leg below the knee and retention of the cup section over the knee.
    Type: Application
    Filed: March 31, 2009
    Publication date: August 19, 2010
    Applicant: Travel Caddy, Inc. d/b/a Travelon
    Inventors: Brad L. Schantz, Hai Du, Yan Wang
  • Patent number: 7575117
    Abstract: A collapsible carrying case includes a faux bottom panel which may be folded between the collapsed condition and a fully open carrier case condition. The end panels of the carrier case are also foldable between the collapsed condition and fully open condition.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: August 18, 2009
    Assignee: Travel Caddy, Inc.
    Inventors: Andrezj M. Redzisz, Donald E. Godshaw, Hai Du
  • Patent number: 7568600
    Abstract: A tank bag for a vehicle such as an all terrain vehicle or motorbike includes bags for placement on each side of a center ridge of the vehicle. The bags are connected by adjustable straps and a bridging panel. Hook elements are included to maintain the bag construction in a fixed position on the vehicle.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: August 4, 2009
    Assignee: Travel Caddy, Inc.
    Inventors: Donald E. Godshaw, Andrezj M. Redzisz, Hai Du
  • Publication number: 20070241157
    Abstract: An all terrain vehicle cargo bag assembly includes two or more separate sections which are connectable one to the other or detachable and which enable the inclusion of specially designed inserts in the combination for purposes of transport of various items. The assembly typically includes a central section and first and second lateral side sections attachable to the central section by means of hook and loop fastener straps. A protective flap on one side of the central section covers the connecting straps and also serves as a backrest when the luggage assembly is attached to an all terrain vehicle and appropriately positioned relative to the seat of the vehicle.
    Type: Application
    Filed: April 21, 2006
    Publication date: October 18, 2007
    Applicant: Travel Caddy, Inc. d/b/a Travelon
    Inventors: Donald Godshaw, Andrezj Redzisz, Hai Du
  • Publication number: 20070164068
    Abstract: A tank bag for a vehicle such as an all terrain vehicle or motorbike includes bags for placement on each side of a center ridge of the vehicle. The bags are connected by adjustable straps and a bridging panel. Hook elements are included to maintain the bag construction in a fixed position on the vehicle.
    Type: Application
    Filed: January 19, 2006
    Publication date: July 19, 2007
    Applicant: Travel Caddy, Inc. d/b/a Travelon
    Inventors: Donald Godshaw, Andrezj Redzisz, Hai Du
  • Publication number: 20060037881
    Abstract: A collapsible carrying case includes a faux bottom panel which may be folded between the collapsed condition and a fully open carrier case condition. The end panels of the carrier case are also foldable between the collapsed condition and fully open condition.
    Type: Application
    Filed: October 27, 2005
    Publication date: February 23, 2006
    Applicant: Travel Caddy, Inc. d/b/a Travelon
    Inventors: Andrezj Redzisz, Donald Godshaw, Hai Du