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:
Mar. 21, 1989
Filed:
Aug. 31, 1987
Applicant:
Inventors:
Gerhard Kunz, 5628 Heiligenhaus, DE;
Johannes Goebel, 6501 Stadecker-Elsheiml, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
210662 ; 210 961 ; 210143 ;
Abstract
A temperature compensated differential between electrical conductivity measurements of a filter medium during passage therethrough of liquid being treated and measurement of the liquid alone after treatment, is utilized to calculate a conductivity ratio based on a reference value reflecting a minimum electrical conductivity measurement under ion saturation conditions in an ion-exchange filter. The filter is switched from an operational mode to a regenerating mode in response to detection of a predetermined conductivity ratio corresponding to approach of the filter to a clogged condition.