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. 11, 1982
Filed:
Aug. 08, 1980
Jochen Koll, Odenthal, DE;
Hans-Heinz Molls, Leverkusen, DE;
Reinhold Hornle, Cologne, DE;
Erhard Schuffenhauer, Leverkusen, DE;
Horst Brandt, Odenthal, DE;
Fritz Bremer, Leverkusen, DE;
Karlheinz Wolf, Leverkusen, DE;
Willy Schiwy, Monheim, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Highly concentrated liquid preparations of disperse dyestuffs are obtained with a low consumption of energy by first adding a dispersing agent to the water-moist dyestuff press-cake to convert it into a form in which it is capable of flow, subjecting this product to wet grinding and increasing the dyestuff content of the resulting, insufficiently concentrated dispersion in a second step by means of a membrane separation process, for example pressure permeation.