Patents Represented by Attorney Duke Yee
  • Patent number: 7468173
    Abstract: The invention uses a feed of atmospheric air and mixes the air with hydrogen. The hydrogen and air mixture is fed into a catalytic reactor where a deoxygenation reaction occurs. The deoxygenation reaction uses a platinum catalyst to produce water from oxygen and hydrogen. The nitrogen passes through the catalytic reactor without reacting with the hydrogen, the oxygen, or the water. The water is separated from the nitrogen in a dryer. The nitrogen may then be used in drilling and production operations. The water is fed into an electrolyzer where an electrolysis reaction occurs. The electrolyzer passes an electrical current through the water to produce gaseous oxygen and hydrogen. The hydrogen is recycled back to the catalytic reactor and the oxygen may be vented or sold.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: December 23, 2008
    Assignee: Sunstone Corporation
    Inventors: William James Hughes, Mark Dunbar
  • Patent number: 6359314
    Abstract: A method and apparatus for manufacturing an electrostatic discharge protection device. A first gate structure for the electrostatic device is formed. A first lightly doped drain and a second lightly doped drain for the electrostatic discharge protection device is formed. A second gate structure for a data path transistor is formed. A third lightly doped drain and a fourth lightly doped drain for a data path transistor is formed, wherein the first lightly doped drain and the second lightly doped drain have a higher doping level relative to the third lightly doped drain and the fourth lightly doped drain.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: March 19, 2002
    Assignee: LSI Logic Corporation
    Inventor: Todd A. Randazzo
  • Patent number: 5809561
    Abstract: An improved method and apparatus for managing real pages, also called physical pages, and virtual pages, also called logical pages, in a virtually indexed cache that is implemented as two physical caches. A list of free real pages that is a doubly linked list with a single anchor in addition to the free real pages is created. The pages are sequentially associated with each other using two sets of pointers. A set of forward pointers are used with the first pointer connecting the anchor page to the first physical page in the list and subsequent pointers connecting subsequent pages with each other with the last page having a pointer pointing to the anchor page. A set of backward pointers are employed with the first pointer pointing from the anchor to the last page in the list with subsequent pointers traversing the list towards the first page with the first page having the last pointer pointing to the anchor page.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: September 15, 1998
    Assignee: International Business Machines Corp.
    Inventors: David William Sheffield, Kumar Nallapati, Mark Douglass Rogers