Patents by Inventor Joseph Roy

Joseph Roy 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).

  • Arc discharge lamp having improved lumen maintenance
    Patent number: 4639637
    Abstract: Lumen maintenance of fluorescent lamps is improved by overcoating the phosphor layer with a coating of submicron size alumina having a weight greater than 160 micrograms per square centimeter.
    Type: Grant
    Filed: January 27, 1981
    Date of Patent: January 27, 1987
    Assignee: GTE Products Corporation
    Inventors: Fred R. Taubner, Joseph A. Roy
  • Fluorescent lamp having double phosphor layer
    Patent number: 4431941
    Abstract: A fluorescent lamp has two phosphor layers, the phosphor of the first layer being less expensive than the phosphor of the second layer. The second phosphor layer improves the lamp efficiency.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: February 14, 1984
    Assignee: GTE Products Corporation
    Inventors: Joseph A. Roy, Fred R. Taubner
  • Method and apparatus for the production of seismic shocks
    Patent number: 4408677
    Abstract: A releasable heavy mass is provided which is capable of producing by impact with the ground a shock which can be used in seismic prospecting.This mass is characterized by the fact that it comprises very many individual heavy elements connected together in a way loose enough to allow deformation of the mass without loss of cohesion on impact, and in that its base is of considerable area relative to the surface of the whole mass and is maintained substantially plane at least after release and up to impact. The mass is, in seismic prospecting, released from a helicopter.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: October 11, 1983
    Assignee: Compagnie Generale de Geophysique
    Inventor: Jean-Joseph Roy
  • Mercury dispenser for discharge lamps
    Patent number: 4335326
    Abstract: A glass mercury dispenser for inclusion within an arc discharge lamp is surrounded by a particle shield to catch shards when the capsule is subsequently ruptured.
    Type: Grant
    Filed: April 23, 1980
    Date of Patent: June 15, 1982
    Assignee: GTE Products Corporation
    Inventors: Frank M. Latassa, John G. Ray, Joseph A. Roy