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:
Sep. 22, 1981
Filed:
Jul. 28, 1980
Applicant:
Inventor:
Ehrenfried Loock, Wilhelmshaven, DE;
Assignee:
Olympia Werke AG, Wilhelmshaven, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D / ; C07C / ;
U.S. Cl.
CPC ...
106 22 ; 260208 ;
Abstract
A method for the production of an ink suitable for use in ink-jet printing, free from foreign salts, made from technical dyes. A highly water-soluble dye is dissolved in water and precipitated with a precipitant amine. The precipitate is separated from the solution and distilled with water and a water-soluble amine of low volatility to convert the dye back to a soluble form.