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. 11, 1992
Filed:
Apr. 19, 1990
Bob W Wright, Richland, WA (US);
Jonathan S Fruchter, Richland, WA (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A field-portable supercritical fluid extraction apparatus uses an SFE solvent delivery means, SFE solvent cooling means, and reciprocating high pressure liquid chromatography pump having a cooled pumphead. A solid matrix sample is contained within an extraction cell. The SFE solvent is preheated in the extraction cell oven before it is introduced into the extraction cell. After contact with the solid matrix the extraction effluent passes through a heated restriction tube before passing into a collection flask assembly having a collection solvent tube and a collection solvent condenser to condense collection solvent vapors entrained by escaping SFE solvent. The analytes are collected in the collection solvent. The SFE solvent cooling means, pumphead and collection solvent condenser are all cooled by the combination of a single stage thermoelectric device, liquid-cooled heat exchanger and convective heat sink.