Patents Assigned to Hilux Development
  • Incandescent lamp filament incorporating hafnium
    Patent number: 5148080
    Abstract: The lamp filament has a substoichiometric nitrided surface layer containing hafnium or hafnium alloy which exhibits higher emissivity in the visible light spectrum. The filament is made by providing a metallic wire containing hafnium, shaping the wire into a filament and then reacting the filament in an atmosphere containing hydrogen.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: September 15, 1992
    Assignee: Hilux Development
    Inventor: Ray J. Van Thyne