Patents by Inventor David Purvis

David Purvis 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).

  • Adjustable receptacle holder for a vehicle
    Patent number: 10227047
    Abstract: An adjustable retainer for attaching a receptacle, such as a thermal cooler, to a vehicle includes a frame for securing to a vehicle, such as a truck bed. Opposing jaws are movable in guide slots in the frame. One jaw may be manually positioned in a guide slot having hooks, while the other jaw is movable by a linear actuator secured to the frame. The jaws allow optimum positioning of the receptacle and create a vice-like retaining mechanism.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: March 12, 2019
    Inventor: David Purvis
  • Adjustable Receptacle Holder for a Vehicle
    Publication number: 20180257576
    Abstract: An adjustable retainer for attaching a receptacle, such as a thermal cooler, to a vehicle includes a frame for securing to a vehicle, such as a truck bed. Opposing jaws are movable in guide slots in the fame. One jaw may be manually positioned in a guide slot having hooks, while the other jaw is movable by a linear actuator secured to the frame. The jaws allow optimum positioning of the receptacle and create a vice-like retaining mechanism.
    Type: Application
    Filed: March 6, 2018
    Publication date: September 13, 2018
    Inventor: David Purvis
  • On-die impedance calibration
    Patent number: 7391221
    Abstract: One exemplary device has a plurality of leads with termination impedances, and a standard impedance. Among the termination impedances are master impedances arranged to be calibrated by comparison with the standard impedance and slave impedances arranged to be calibrated in accordance with an associated master impedance.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: June 24, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jayen J. Desai, James M. Dewey, David Purvis
  • On-die impedance calibration
    Publication number: 20070013395
    Abstract: One exemplary device has a plurality of leads with termination impedances, and a standard impedance. Among the termination impedances are master impedances arranged to be calibrated by comparison with the standard impedance and slave impedances arranged to be calibrated in accordance with an associated master impedance.
    Type: Application
    Filed: June 24, 2005
    Publication date: January 18, 2007
    Inventors: Jayen Desai, James Dewey, David Purvis
  • Integrated high temperature high conversion olefin/polyolefin process
    Patent number: 6111156
    Abstract: A combined chain of a high temperature, high conversion steam cracker in combination with a polymerization or oligomerization unit provides capital and operating cost reduction.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: August 29, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Michael C. Oballa, David Purvis, Andrzej Z. Krzywicki, Leslie W. Benum
  • Integrated cracking and olefins derivative process utilizing dilute olefins
    Patent number: 5981818
    Abstract: A novel process is provided which integrates the cracking of hydrocarbon containing feedstocks with the olefins purification and olefins derivative process utilizing dilute olefin feedstocks.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: November 9, 1999
    Assignee: Stone & Webster Engineering Corp.
    Inventors: David Purvis, Richard H. Mc Cue