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:
Apr. 04, 1978
Filed:
Nov. 03, 1976
Applicant:
Inventors:
Klaus Joachim Braun, Uberlingen, DT;
Hans Gunter Siess, Owingen, DT;
Assignee:
Bodenseewerk Perkin-Elmer & Co., GmbH, Uberlingen (Bodensee), DT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356 85 ; 356244 ;
Abstract
An improved graphite tube for use in a flameless atomic absorption spectrometer, which is characterized by a mechanically roughened area on at least a portion of the outer peripheral surface of the graphite tube for providing substantially constant emissivity for pyrometric temperature measurement, and in a preferred form the mechanically roughened area has superimposed thereon a microscopic chemically roughened area.