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. 01, 1981
Filed:
Aug. 28, 1978
Applicant:
Inventor:
Herbert M Cullis, Silver Spring, MD (US);
Assignee:
Baxter Travenol Laboratories, Inc., Deerfield, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
356 39 ; 356442 ; 356432 ;
Abstract
The method includes the steps of: placing blood in a transparent tubing; passing intense, coherent light through the tubing and blood; sensing the light passed through the tubing and blood; and, producing a signal related to the amount of transmitted light sensed and indicative of the hematocrit of the blood. The apparatus includes a laser light source for generating the intense, coherent light beam at a wavelength in the red spectrum and an optical photodetector including a silicon diode positioned to receive the transmitted light and an amplifier circuit.