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:
Jan. 31, 1989
Filed:
Feb. 18, 1988
Applicant:
Inventors:
Assignee:
Horiba, Ltd., Miyanohigashi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 19 ; 422 80 ;
Abstract
A heat melting type gas extraction apparatus is employed to measure oxygen in a silicon sample. A double graphite crucible is first heated, in the absence of the sample or a flux metal, to extract oxygen therein. The flux metal is then added to the crucible and heated to extract oxygen therein. The sample is then added, melted, and heated to produce a sample gas for analysis.