Patents by Inventor Pradeep Kumar Ghosh

Pradeep Kumar Ghosh 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).

  • Long decay luminescent powder and process for preparation thereof
    Publication number: 20030183807
    Abstract: Phosphor powder with the basic composition comprising alkaline earth metal aluminate, an activator such as Eu and a co activator has been disclosed. The said phosphor has been synthesized by use of alkaline earth metal salt along with single phase alumina, an activator and a co-activator. The after glow decay was found to be more than 150 hours. The process uses a reducing agent in the form of carbon or an organic compound of carbon.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 2, 2003
    Inventors: Virendra Shankar, Harish Chander, Haranath Divi, Pradeep Kumar Ghosh