Patents Assigned to Ceram-Dent, Inc.
  • Investment casting method
    Patent number: 4213495
    Abstract: An improved method incorporating investment burn out at a predetermined ideal temperature. The investment encasing the wax-like model of the desired casting is placed in an oven preheated to an ideal burn out temperature. The oven is maintained at that temperature while the pressure in the oven is increased to a predetermined pressure and maintained at that pressure for a given time. Following that time, the pressure is cycled between the predetermined pressure and atmospheric pressure or below for a second predetermined time.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: July 22, 1980
    Assignee: Ceram-Dent, Inc.
    Inventor: Stanley E. Rose