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. 11, 1984
Filed:
Jul. 27, 1982
Applicant:
Inventors:
Akitoshi Takayanagi, Kawasaki, JP;
Tokio Kano, Akishima, JP;
Assignee:
Olympus Optical Co. Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
436-2 ; 7386301 ; 7386321 ; 204403 ; 324 / ; 422 68 ; 422101 ; 436 63 ; 436150 ; 436177 ;
Abstract
A method and an apparatus for detecting a boundary surface between a blood plasma and a blood corpuscle suspension obtained after centrifuging are disclosed. An impedance across a pair of electrodes is measured by applying an A.C. voltage across the electrodes at such a frequency that impedances of the blood plasma and the blood corpuscle suspension are made greatly different from each other. When the impedance changes abruptly, it is determined that the electrodes have passed through the boundary surface.