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:
Jun. 11, 1991
Filed:
Mar. 20, 1990
Gunter Voss, Much, DE;
Finn-Aqua, Hurth, DE;
Abstract
A freeze-drying apparatus has a freeze-drying chamber, a double-walled product shelf disposed within the freeze-drying chamber, a conduit system partially disposed within the freeze-drying chamber and attached to the product shelf for temperature regulation thereof, a heat-exchange fluid contained in the conduit system, a test gas reservoir connected to the conduit system outside of the freeze-drying chamber, and a test gas specific detector connected to the chamber for detecting test gas introduced into the freeze-drying chamber from the heat-exchange fluid through a leak in the conduit system. In the alternative, the test gas reservoir is connected to the freeze-drying chamber, and a test gas specific detector is connected to the conduit system outside the freeze-drying chamber for detecting test gas introduced into the heat exchange fluid from the freeze-drying chamber through a leak in the conduit system.