Patents by Inventor Gundlapalli Venkata Subba Rao

Gundlapalli Venkata Subba Rao 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).

  • Blue emitting Ce.sup.3+ Activated borate phosphors used in fluorescent lamps and TV tubes and a process for synthesizing the same
    Patent number: 6165385
    Abstract: The present invention relates to novel blue emitting Ce.sup.3+ activated borate phosphors which are used in fluorescent having lamps and TV tubes, having the formula A.sub.6 M.sub.1-x Ce.sub.x M'(BO.sub.3).sub.6 wherein A=La,Sr; M=La,Y, Gd, Lu; and M=Mg, Al, Ga, and x ranging from 0.001-1, and a process for the synthesis of the said activated borate phosphors.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: December 26, 2000
    Assignee: Council of Scientific and Industrial Research
    Inventors: Gundlapalli Venkata Subba Rao, Ramakrishnan Sankar
  • Green emitting TB.sup.3+ activated borate phosphors used in low pressure mercury vapour lamps and a process for synthesizing the same
    Patent number: 6090310
    Abstract: The present invention relates to novel green emitting Tb.sup.3+ activated borate phosphors having the formula A.sub.6 M.sub.1-x Tb.sub.x M'(BO.sub.3).sub.6 wherein A=Sr; M=Y, Gd; M'=Sc, Y, Gd, Al, Ga; and 0.02.ltoreq.x.ltoreq.1, and a process for the synthesis of such activated borate phosphors.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: July 18, 2000
    Assignee: Council of Scientific and Industrial Research
    Inventors: Gundlapalli Venkata Subba Rao, Ramakrishnan Sankar