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:
Jun. 15, 1999
Filed:
Jun. 01, 1998
Applicant:
Inventors:
Ashim K Bannerjee, Westminster, CO (US);
Robert D Stream, Loveland, CO (US);
Assignee:
Hach Company, Loveland, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01J / ;
U.S. Cl.
CPC ...
356364 ; 3562432 ; 356338 ;
Abstract
A system is described for verifying the calibration of a turbidimeter having a light source and a detector for scattered light. A first polarizer is positioned in the path of the light beam, and a second polarizer is positioned between the first polarizer and the detector. The first polarizer linearly polarizes the light beam and the second polarizer restricts the amount of light passing through it to reach the detector.