Patents Represented by Attorney, Agent or Law Firm Blake T. Beiderman
  • Patent number: 6328927
    Abstract: A method is provided for fabricating tungsten sputter targets having a density of at least about 97% of theoretical density and an oxygen content of at least about 100 ppm less than the starting powder. According to the principles of the present invention, a tungsten powder having a powder size less than about 50 &mgr;m and an oxygen content less than about 500 ppm is hot-isostatic pressed at a temperature of about 1200° C. to about 1600° C. and a pressure of at least about 15 ksi for at least about 3 hours. A high-purity sputter target is further achieved by using a tungsten starting powder having a purity higher than about 99.999%.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: December 11, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Chi-Fung Lo, Paul S. Gilman, Darryl Draper
  • Patent number: 6149181
    Abstract: A retractable hitch that stores away from view. The hitch consists of a hollow connector bar having an attachment end and a receiver end. The attachment end of the connector bar has an opening extending laterally through it. A mounting bar at the receiver end contains a storage chamber. A draw bar having a connector end and a hitch end fits within the connector bar. The connector end has an opening piercing it; and the hitch end has an end for connecting devices. A locking pin extends through the opening in the attachment end of the connector bar and the opening in the connector end of the draw bar. The locking pin locks in a first position for securing the draw bar in a first position for attaching devices and a second position for storing the connector bar within the storage chamber.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: November 21, 2000
    Inventor: Frederick Lee Biederman