Patents by Inventor Alexandre Vetrovs

Alexandre Vetrovs 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).

  • Efficient UV-emitting phosphors based on cerium-activated calcium pyrophosphate and lamps containing the same
    Patent number: 4757233
    Abstract: The present invention is directed to phosphors exhibiting efficient, narrow band UV emission, with peak emission at 330 nm (from excitation at 254). These phosphors are cerium-activated calcium pyrophosphate (beta-phase) of nominal formulationCa(.sub.2-w-x-y) (NSF).sub.w Ce.sub.x Na.sub.y P.sub.2 O.sub.7wherein:NSF is the non-stoicheometric factor;0.ltoreq.w.ltoreq.0.1;0.05.ltoreq.x.ltoreq.0.20; and0.05.ltoreq.y.ltoreq.0.20.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: July 12, 1988
    Assignee: GTE Laboratories Inc.
    Inventors: Thomas E. Peters, Romano G. Pappalardo, Alexandre Vetrovs