Patents Assigned to Ideal Architectural Doors & Plywood
  • Fire resistant steel door with drop-in core
    Patent number: 5722213
    Abstract: A heat temperature rise door is made up of a steel shell and a core which is not bonded to the steel shell, thus eliminating much of the cost of manufacture of the door.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: March 3, 1998
    Assignee: Ideal Architectural Doors & Plywood
    Inventor: Steven M. Morency