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:
Dec. 15, 1992
Filed:
Mar. 18, 1991
Tetsuya Mega, Chiba, JP;
Michio Katayama, Chiba, JP;
Masao Yokoi, Chiba, JP;
Yasuko Furunushi, Chiba, JP;
Kawasaki Steel Corporation, Hyogo, JP;
Abstract
An improved glow discharge atomic emission spectroscopy method and apparatus is offered in which the introduction of a rare gas into a glow discharge tube is temporarily cut off and after the inside of the glow discharge tube is maintained at a higher degree of vacuum, a preliminary discharge is executed to remove adsorbed or extraneous substances on the specimen surface, and then the analysis of the specimen surface is performed. The method and the apparatus described in the above are suitable for quick and simple analysis of the uppermost surface layer of a solid specimen in the direction of depth.