Patents Assigned to International Portland Corporation
  • Controlled environment chamber apparatus
    Patent number: 5169217
    Abstract: Controlled environment chamber apparatus for maintaining biological material under controlled conditions of temperature and/or humidity comprises a cabinet defining a chamber, a door for controlling access to the chamber, and a clean air source for providing a flow of clean air past the chamber opening.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: December 8, 1992
    Assignee: International Portland Corporation
    Inventors: Kenneth L. Orchard, Frank W. Enderlin