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. 05, 1989
Filed:
May. 16, 1988
Applicant:
Inventors:
Yutaka Yamagishi, Kyoto, JP;
Kenji Takeda, Kyoto, JP;
Assignee:
Horiba Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250345 ; 250343 ;
Abstract
An infrared gas analyzer reduces influenced results from interfering gases by utilizing a first filter system intermediate a light source and a gas cell in which the sample is located. The filter system passes light having wavelengths within absorption bands of the gas to be measured. It also reflects light having wavelengths outside of the absorption bands. A second filter system is also intermediate the light source and the first filter system. The second filter system absorbs light having wavelengths within absorption bands of an interfering component gas.