Patents by Inventor Lambert Christiaan Ida Kaldenhoven

Lambert Christiaan Ida Kaldenhoven 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).

  • Low-pressure mercury vapor discharge lamp
    Patent number: 7977858
    Abstract: A low-pressure mercury vapor discharge lamp is provided with a discharge vessel which encloses a discharge space including a filling of mercury and a rare gas in a gastight manner. The discharge vessel further includes an amalgam which communicates with the discharge space. The lamp has a discharge device for maintaining an electric discharge in the discharge vessel. The amalgam includes a bismuth-tin-indium compound having a bismuth (Bi) content in the range between 30?Bi?70 wt. %, a tin (Sn) content in the range between 25?Sn?67 wt. %, and an indium (In) content in the range between 3?In ?5 wt. %.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: July 12, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Wim Hellebrekers, Lambert Christiaan Ida Kaldenhoven
  • LOW-PRESSURE MERCURY VAPOR DISCHARGE LAMP
    Publication number: 20100019651
    Abstract: The invention relates to a low-pressure mercury vapor discharge lamp provided with a discharge vessel (10; 210; 310) which encloses a discharge space (11; 211; 311) comprising a filling of mercury and a rare gas in a gastight manner. The discharge vessel (10; 210; 310) further comprises an amalgam (63; 263; 363) which communicates with the discharge space (11; 211; 311). The lamp has discharge means (41a, 41b; 234; 341a, 341b) for maintaining an electric discharge in the discharge vessel (10; 210). The amalgam (63; 263; 363) comprises a bismuth-tin-indium compound having a bismuth (Bi) content in the range between 30<Bi<70 wt. %, a tin (Sn) content in the range between 25<Sn<67 wt. %, and an indium (In) content in the range between 3<In<5 wt. %. The lamp according to the invention can be dimmed in a more controller manner.
    Type: Application
    Filed: July 17, 2007
    Publication date: January 28, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Wim Hellebrekers, Lambert Christiaan Ida Kaldenhoven
  • Low-pressure mercury-vapor discharge lamp and amalgam
    Patent number: 6734616
    Abstract: A low-pressure mercury-vapor discharge lamp is provided with a discharge vessel (10). The discharge vessel (10) encloses a discharge space (11) provided with a filling of mercury and an inert gas in a gastight manner. The discharge vessel (10) is provided with an amalgam which communicates with the discharge space (11). The discharge lamp comprises means for maintaining an electric discharge in the discharge vessel (10). The discharge lamp is characterized in that the amalgam comprises a bismuth-lead amalgam having a lead content in the range from 35≦Pb≦60 at. %, a bismuth content in the range from 40≦Bi≦65 at. %, and a mercury content in the range from 0.05≦Hg≦1 at. %. Preferably, the amalgam additionally comprises gold with a gold content in the range from 0.1≦Au≦20 at. %. Preferably, the gold content is in the range from 8≦Au≦12 at. %.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: May 11, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Martijn Henri Richard Lankhorst, Wilhelmus Cornelis Keur, Lambert Christiaan Ida Kaldenhoven