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:
Feb. 12, 1991
Filed:
Nov. 20, 1989
Klaus-Peter Mueller, Juelich, DE;
Jochen Rudolph, Huertgenwald, DE;
Abstract
For intermediate enrichment of trace substances from a gas stream, a cold ap is used which carries a flow and optionally contains an adsorbent material and which is surrounded by a gas-tight double-walled jacket into which cooling fluid from a surrounding cooling bath can penetrate via an extension tube at the bottom. For desorption, the cooling fluid is expelled from the double-walled jacket via compressed air and a valve control. A pipe loop connected to the double-walled jacket and having a heater winding and circulation pump allows rapid heating of the cold trap. A level control apparatus connected to the compressed-air line allows sensitive level adjustment in the bottom extension tube of the double-walled jacket during the desorption phase. Such a cold trap is advantageous, inter alia, in a chromatography arrangement with a separation column and fractionating column of high resolution and sensitivity.