Patents Assigned to SP Industries
  • Freeze dryer apparatus having an interim condensing system and use thereof
    Patent number: 5199187
    Abstract: The subject invention provides a freeze dryer apparatus having an interim condensing system, preferably a refrigeratable condensing surface. The interim condensing system condenses vapors within the product chamber of the freeze dryer apparatus when the main condenser coil, which normally condenses vapors within the product chamber, needs to be defrosted. The refrigeratable condensing surface is preferably mounted inside the product chamber.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: April 6, 1993
    Assignee: SP Industries
    Inventor: David T. Sutherland