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:
Jul. 24, 1990
Filed:
Jun. 09, 1988
Applicant:
Inventor:
Masaji Nishikawa, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250573 ; 356440 ; 250576 ;
Abstract
Apparatus for measuring concentration of liquid developer or the like includes a holding member formed with an opening in which the liquid to be measured is retained. The holding member is driven to pass through a measuring station in which a photoelectric detector is disposed. The detector determines the amount of light transmitted through the liquid retained in the opening, thus measuring the concentration of colored component in the liquid.