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:
Oct. 16, 1990
Filed:
Aug. 30, 1988
Applicant:
Inventors:
Uwe Mrotzeck, Kelkheim, DE;
Peter Mischke, Bad Soden am Taunus, DE;
Gunther Schwaiger, Frankfurt am Main, DE;
Werner Russ, Hofheim am Taunus, DE;
Manfred Sittig, Kriftel, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurst am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ; C09B / ; C09B / ;
U.S. Cl.
CPC ...
534618 ; 534617 ; 534622 ; 534623 ; 534624 ; 534625 ; 534626 ; 534627 ; 534628 ; 534629 ; 534887 ; 540126 ; 540133 ;
Abstract
Free radical heavy metal ions in water-soluble heavy metal complex dyestuffs are removed from the synthesis solution of the heavy metal complex dyestuff by means of a compound or several of the compounds mentioned below: