Patents by Inventor Nancy J. Caruso

Nancy J. Caruso 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).

  • Metal halide lamp with ceramic discharge vessel and magnesium in the fill to improve lumen maintenance
    Patent number: 5698948
    Abstract: A metal halide lamp includes a discharge vessel with a ceramic wall and a filling which comprises besides mercury and a halogen also Na, Tl and one or several of the elements from the group formed by Sc, Y and lanthanides. The filling also contains Mg to improve lumen maintenance.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: December 16, 1997
    Assignee: U.S. Philips Corporation
    Inventor: Nancy J. Caruso
  • High color rendering calcium-containing metal halide lamp
    Patent number: 4742268
    Abstract: A metal halide lamp provides exceptional color rendition because of a high calcium iodide partial pressure. A long-arc ellipsoidal arc tube provides a high "cold spot" temperature. The method of manufacture of the lamp includes heating the arc tube tubulation while burning the lamp after dosing, and then an evacuation step to eliminate moisture due to the hygroscopic calcium iodide.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: May 3, 1988
    Assignee: North American Philips Electric Co.
    Inventors: Nancy J. Caruso, Michael H. Masto
  • Method of manufacturing metal halide lamp
    Patent number: 4643690
    Abstract: A metal halide lamp provides exceptional color rendition because of a high calcium iodide partial pressure. A long-arc ellipsoidal arc tube provides a high "cold spot" temperature.The method of manufacture of the lamp includes heating the arc tube tubulation while burning the lamp after dosing, and then an evacuation step to eliminate moisture due to the hygroscopic calcium iodide.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: February 17, 1987
    Assignee: North American Philips Electric Corporation
    Inventors: Nancy J. Caruso, Michael H. Masto