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:
Aug. 26, 2003
Filed:
Sep. 20, 2001
Applicant:
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 2/135 ;
U.S. Cl.
CPC ...
G01N 2/135 ;
Abstract
An isotopomer absorption spectral analyzing apparatus and its method for precisely measuring the isotope ratio by substantially equalizing the absorption signal levels of different species of isotopes. In an isotopomer absorption spectral analyzing apparatus, a sample cell ( ) capable of providing optical paths of different optical lengths is installed, optical beams A, B are caused to enter the sample cell ( ) and travel along paths of different optical lengths, thereby determining the abundance ratio between species of isotopes in molecules from the ratio between intensities of signals corresponding to the species of isotopes.