Patents by Inventor David Du

David 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).

  • Patent number: 10544880
    Abstract: A mudmat for a subsea pipeline accessory has a body with an accessory support structure arranged to lie underneath and support an accessory. At least one foundation element attached to the body is movable from a stowed position at least partially under the accessory support structure into a deployed position extending laterally from the accessory support structure after overboarding the accessory from a vessel and before landing the accessory on the seabed. Two or more foundation elements may be deployed simultaneously in laterally-opposed directions transverse to the longitudinal axis of a pipe that supports the accessory.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: January 28, 2020
    Assignee: Subsea 7 Limited
    Inventor: David Du
  • Publication number: 20180195642
    Abstract: A mudmat for a subsea pipeline accessory comprises a body (12) having an accessory support structure (16) arranged to lie underneath and support an accessory. At least one foundation element (14) attached to the body is movable from a stowed position at least partially under the accessory support structure into a deployed position extending laterally from the accessory support structure after overboarding the accessory from a vessel and before landing the accessory on the seabed. Two or more foundation elements may be deployed simultaneously in laterally-opposed directions transverse to the longitudinal axis of a pipe that supports the accessory.
    Type: Application
    Filed: March 5, 2018
    Publication date: July 12, 2018
    Inventor: David Du
  • Patent number: 9909689
    Abstract: A mudmat for a subsea pipeline accessory has a body with an accessory support structure arranged to lie underneath and support an accessory. At least one foundation element attached to the body is movable from a stowed position at least partially under the accessory support structure into a deployed position extending laterally from the accessory support structure after overboarding the accessory from a vessel and before landing the accessory on the seabed. Two or more foundation elements may be deployed simultaneously in laterally-opposed directions transverse to the longitudinal axis of a pipe that supports the accessory.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: March 6, 2018
    Assignee: Subsea 7 Limited
    Inventor: David Du
  • Publication number: 20160025240
    Abstract: A mudmat for a subsea pipeline accessory has a body with an accessory support structure arranged to lie underneath and support an accessory. At least one foundation element attached to the body is movable from a stowed position at least partially under the accessory support structure into a deployed position extending laterally from the accessory support structure after overboarding the accessory from a vessel and before landing the accessory on the seabed. Two or more foundation elements may be deployed simultaneously in laterally-opposed directions transverse to the longitudinal axis of a pipe that supports the accessory.
    Type: Application
    Filed: March 3, 2014
    Publication date: January 28, 2016
    Inventor: David Du
  • Patent number: 7166303
    Abstract: Propofol solubilised in aqueous micellar preparations of poloxamers is stable at low concentrations and that such preparations are effective administration forms for Propofol.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: January 23, 2007
    Assignee: Maelor Pharmaceuticals Limited
    Inventors: John Meadows, James David Du Mayne
  • Publication number: 20030138489
    Abstract: Propofol solubilised in aqueous micellar preparations of poloxamers is stable at low concentrations and that such preparations are effective administration forms for Propofol.
    Type: Application
    Filed: October 31, 2002
    Publication date: July 24, 2003
    Inventors: John Meadows, James David Du Mayne
  • Patent number: 5371851
    Abstract: A system manipulates stimulus/response signal data associated with an integrated circuit design, such as from a computer-aided engineering simulator, and converts the data into a format acceptable by a tester device which tests a prototype or production integrated circuit. The data is graphically displayed as a waveform and as a vector sequence. On-screen editing of either display is reflected in the other display. Further, the same displays are used to convert the data from event-based data into cycle-based template data compatible with a tester. A mix between event and state data during the conversion is allowed. A standard frame generation language is presented for defining tester frames for each signal within a template or timeset. A workbench editor provides for icon-based control of the system.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: December 6, 1994
    Assignee: Credence Systems Corporation
    Inventors: Chris M. Pieper, Cathie J. B. Wier, Eric M. Bush, Thomas W. Rudwick, III, William A. Greenseth, Robert R. Klingenberg, David Du Pont