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:
May. 19, 1987
Filed:
Mar. 29, 1985
Friedrich Martinola, Cologne, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Method for rendering visible the line of separation between cation exchangers and anion exchangers in mixed-bed filters, in which method an amount of a cation exchanger (anion exchanger) sufficient to form a visible line is added to the cation exchangers and anion exchangers constituting the mixed-bed, the added ion exchanger clearly differing optically from the cation exchanger and anion exchanger used to build up the mixed-bed and having a density 0.01-0.05 g/ml lower (higher) than that of the mixed-bed cation exchanger (mixed-bed anion exchanger), and the resin beads of which predominantly having the same particle sizes as the finest (coarsest) screen fraction of the mixed-bed cation exchanger (mixed-bed anion exchanger).