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. 20, 2000
Filed:
Dec. 18, 1998
Michael W Holdren, Columbus, OH (US);
Scott N Danhof, Plain City, OH (US);
Michael J Grassi, Worthington, OH (US);
Joseph A Stets, Gahanna, OH (US);
G William Keigley, Columbus, OH (US);
Battele Memorial Institute, , US;
Abstract
A compact, portable, thermoelectric cold trap for capturing certain gaseous species for analysis in gas chromatographs is disclosed. The U-shaped heat exchanger and T-shaped cold block for holding the adsorbent tube and heater allow the unit to operate over a temperature range from -45.degree. to 300.degree. C. The thermoelectric cold trap is portable and may be retrofitted to new or existing gas chromatographs. The adsorbent tube and heater are also replaceable. A method of assembling the thermoelectric cold trap and a method of operating the thermoelectric cold trap are also disclosed.