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:
Feb. 25, 1992
Filed:
May. 11, 1990
Applicant:
Inventors:
Vincent Chow, Hanover Park, IL (US);
Byron Denenberg, Northfield, IL (US);
Assignee:
MDA Scientific, Inc., Lincolnshire, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ; G01J / ;
U.S. Cl.
CPC ...
250226 ; 356402 ; 2502 / ; 250239 ; 422 87 ;
Abstract
A monitor for the detection of a target gas by sensing the color change of a colorimetric indicator material. The monitor includes a light detector positioned and having a surface oriented to receive light reflected from the colorimetric indicator material and a light source positioned between the colorimetric indicator material and the light detector and oriented to provide illumination to the colorimetric indicator material but not to the light detector.