Patents by Inventor Petrus Franciscus Josef VAN DEN Boom

Petrus Franciscus Josef VAN DEN Boom 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).

  • Luminescent material
    Patent number: 4003845
    Abstract: Luminescent cerium- and manganese-activated aluminate which is defined by the formulaLa.sub.1.sub.-x.sub.-p Ba.sub.x Ce.sub.p Al.sub.y.sub.-q Mn.sub.q O.sub.1.5y.sub.+1.5.sub.-0.5x.sub.- 0.5qWhere10 .ltoreq. y .ltoreq. 130.10 .ltoreq. x .ltoreq. 0.750.05 .ltoreq. p .ltoreq. 0.75x+ p .ltoreq. 0.900.10 .ltoreq. q .ltoreq. 0.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: January 18, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Petrus Franciscus Josef VAN DEN Boom, Albert Leendert Nicolaas Stevels