The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 1980
Filed:
Mar. 09, 1979
Applicant:
Inventor:
Dick Q Durant, Manchester, MO (US);
Assignee:
McDonnell Douglas Corporation, Long Beach, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
F26B / ;
U.S. Cl.
CPC ...
34 92 ; 13 3 / ; 34-4 ; 219 / ; 219 / ;
Abstract
A source of microwave energy is introduced into a pressure vessel in which a vacuum is drawn. Powdered materials to be dried are introduced and removed from the vessel by screw conveyors which are long enough so that in combination with the material, they prevent the loss of the vacuum in the vessel. The materials are transported through the vessel as the moisture is removed therefrom at essentially ambient temperatures. A water vapor condenser is also included within the pressure vessel to reduce the vacuum pumping requirements thereof.