Patents by Inventor Patrick K Johnson

Patrick K Johnson 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).

  • Fire-resistant door
    Patent number: 7028431
    Abstract: A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame, a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the vent of fire, by releasing gas from a supporting gas spring.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: April 18, 2006
    Assignee: Nystrom, Inc.
    Inventors: Jalil Tlemcani, Michael J. Carroll, Patrick K. Johnson
  • Fire-resistant door
    Publication number: 20040045219
    Abstract: A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame, a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the vent of fire, by releasing gas from a supporting gas spring.
    Type: Application
    Filed: September 5, 2003
    Publication date: March 11, 2004
    Applicant: Nystrom, Inc.
    Inventors: Jalil Tlemcani, Michael J. Carroll, Patrick K. Johnson
  • Fire-resistant door
    Patent number: 6615544
    Abstract: A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame; a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the event of fire, by releasing gas from a supporting gas spring.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: September 9, 2003
    Assignee: Nystrom, Inc.
    Inventors: Jalil Tlemcani, Michael J. Carroll, Patrick K. Johnson
  • Motorcycle simulator
    Patent number: D435875
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: January 2, 2001
    Inventor: Patrick K Johnson