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:
Sep. 28, 1993
Filed:
Jan. 21, 1992
Bodenseewerk Perkin-Elmer GmbH, Uberlingen, DE;
Abstract
A graphite tube for electrothermal vaporization of a sample to be investigated is held between annular contacts through which a flow can be passed lengthwise through the graphite tube. The contacts surround the graphite tube in a shell-like manner; a protective gas flow can thus be passed into a cavity which is formed between the graphite tube and the contacts. The contacts are retained in cooling blocks. The sample is introduced into the graphite tube, vaporized, and carried into the plasma by means of a carrier gas flow which is passed through the longitudinal bore of the graphite tube. The graphite tube contains a radial sample infeed opening which can be closed by a controllable closure member applied to the graphite tube.