Patents by Inventor Guy F. Doucin

Guy F. Doucin 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).

  • Installations for processing a product in a gas medium
    Patent number: 4484889
    Abstract: The installation comprises a blowing chamber (1) in which takes place the heat treatment of the product (2) and a recovery chamber (5) surrounding this blowing chamber (1). One at least of the two horizontal walls of the recovery chamber (5) is formed so as to present, on the outside, a flattened outer duct (6) through which the treatment gas is admitted into the recovery chamber (5) and, on the inside, a flattened inner duct (7) through which a part of the treatment gas is discharged from the recovery chamber (5).
    Type: Grant
    Filed: March 1, 1983
    Date of Patent: November 27, 1984
    Assignee: Air Industrie
    Inventors: Paul H. Marchal, Guy F. Doucin