Patents by Inventor Tatjana Rat

Tatjana Rat 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).

  • DISCHARGE LAMP COMPRISING UV-PHOSPHOR
    Publication number: 20090160341
    Abstract: The invention is concerned with a discharge lamp provided with a gas discharge vessel comprising a gas filling with a discharge-maintaining composition, at least part of a wall of the discharge vessel being provided with a luminescent material comprising as a first UV-phosphor a lanthanide-activated lanthanum magnesium aluminate of formula Lai_xMgAl?Oic>:Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001<x<0.5, which discharge lamp is further provided with means for generating and maintaining a gas discharge. If it comprises gadolinium as an activator, such a lamp is especially useful for narrow-band UV-B phototherapy. The invention is also concerned with an UV-phosphor in the form of a lanthanide-activated lanthanum magnesium aluminate of formula Lai_xMgAl?Oic>:Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001<x<0.5.
    Type: Application
    Filed: March 28, 2007
    Publication date: June 25, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Thomas Jüstel, Petra Huppertz, Detlef Uwe Wiechert, Tatjana Rat