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:
Nov. 16, 1976
Filed:
Sep. 15, 1975
Applicant:
Inventor:
Ditmar H Bock, Boston, NY (US);
Assignee:
Calspan Corporation, Buffalo, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
356181 ; 2323 / ; 2325 / ; 250565 ; 250573 ; 356205 ;
Abstract
A process of and apparatus for colorimetry, whereby an indicator is added cyclically to a fluid stream to indicate the presence or absence of a condition in the stream. The presence of the condition may be indicated by the formation of a precipitate, a change of color, etc. A light source and photocell are located downstream of the point of addition of the indicator and by the difference in an optical characteristic such as the transmissivity or scattering of the fluid, at one or more wavelengths, due to the introduction of the indicator, a measure is obtained of the degree to which the tested-for condition is present in the fluid.