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:
Apr. 28, 2009
Filed:
Feb. 21, 2006
C. Wayne Jaeger, Beaverton, OR (US);
Jeffery H. Banning, Hillsboro, OR (US);
C. Wayne Jaeger, Beaverton, OR (US);
Jeffery H. Banning, Hillsboro, OR (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
A process for preparing a colorant of the formula which comprises preparing a first reaction mixture by admixing leucoquinizarin and, optionally, quinizarin, an aminobenzene substituted with an alcohol group of the formula —R—OH, boric acid, and an optional solvent, and heating the first reaction mixture to prepare an alcohol-substituted colorant of the formula followed by converting the colorant thus prepared to either an ester-substituted colorant by reaction with an esterification compound which is either an anhydride of the formula or an acid of the formula RCOOH in the presence of an optional esterification catalyst, or a urethane-substituted colorant by reaction with an isocyanate compound of the formulaR—N═C═C═O,and brominating the colorant thus prepared, wherein either conversion to ester or urethane can be performed before bromination or bromination can be performed before conversion to ester or urethane.