Patents by Inventor Donald Northrop

Donald Northrop 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).

  • Publication number: 20070284817
    Abstract: The invention includes a board game and a method in which a card from a player card deck is used to provide instructions to a player to perform an adult activity. Two types of player card decks are used. One player card deck is suitable for a male player and another player card deck is suitable for a female player.
    Type: Application
    Filed: June 12, 2006
    Publication date: December 13, 2007
    Inventor: Donald Northrop
  • Publication number: 20060057926
    Abstract: A method for constructing a scotopic after-glow lamp for use in an electric lamp with the scotopic lamp having a lamp wall is provided. The method comprises combining scotopic enhanced phosphors with after-glow phosphors, and layering the combined phosphors on the lamp wall with at least a portion of the after-glow phosphors being against the lamp wall and at least a portion of the scotopic phosphors being exposed to the electric arc of the lamp.
    Type: Application
    Filed: June 15, 2005
    Publication date: March 16, 2006
    Inventors: Charles Bolta, Donald Northrop
  • Patent number: 5122710
    Abstract: A phosphor blend for a fluorescent lamp having four rare earth phosphors, each of which emits a narrow band of visible light energy in the visible spectrum. The color of the light produced by three of the phosphors is red, blue and green. The fourth phosphor producing light in the blue-green range improves the color rendering index of the visible light output without seriously afflecting the lumen output as compared to a blend in which only the red-blue-green phosphors are used. A fifth rare earth narrow band phosphor capable of producing energy in the ultraviolet A range can be added to the blend when it is desired to simulate various phases of natural daylight. The band of ultraviolet range energy produced can be smoothed by adding to the blend another phosphor capable of producing energy in the Ultraviolet A range.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: June 16, 1992
    Assignee: Duro-Test Corporation
    Inventors: Donald Northrop, Gerald Schiazzano
  • Patent number: 4891550
    Abstract: A full spectrum fluorescent lamp having a phosphor coating for producing visible light having a high color rendering index and balanced amounts of ultraviolet energy at the same correlated color temperature in which the coating is formed of two groups of phosphors, the first producing the full spectrum when excited and the second narrow bands of visible light to improve the lumen output of the lamp.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: January 2, 1990
    Assignee: Duro-Test Corporation
    Inventors: Donald Northrop, Gerald Schiazzano, Arpad Pirovic
  • Patent number: 4758173
    Abstract: An adaptor for extending tombstone style lamp sockets, as used with fluorescent lamps to permit the use of shorter lamps. The adaptors include pins which are rotated into the standard tombstone style socket and then further include contact openings in a plunger plate movable in a direction along the longitudinal axis of the fluorescent lamp to permit insertion of a fluorescent lamp without the need for rotating it into the tombstone socket.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: July 19, 1988
    Assignee: Duro-Test Corporation
    Inventor: Donald Northrop