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:
Feb. 14, 2006
Filed:
Feb. 26, 2004
Terence Richard Chamberlain, Montgomery, OH (US);
Donald Thomas Derussy, Mason, OH (US);
Michael John Lemmons, Fort Thomas, KY (US);
Terence Richard Chamberlain, Montgomery, OH (US);
Donald Thomas DeRussy, Mason, OH (US);
Michael John Lemmons, Fort Thomas, KY (US);
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
A process for the manufacture of a pigments form of perylene-3,4,9,10-tetracarboxylic acid N,N'-bis-methylimide having a transparent clean yellowish shade, comprises comminution of a mixture comprising perylene-3,4,9,10-tetracarboxylic acid N,N′-bis-methylimide produced by methylation of perylenetetracarboxylic imide with an alkylating agent and perylene-3,4,9,10-tetracarboxylic acid N,N′-bis-methylimide produced by the condensation of perylenetetracarboxylic anhydride with methylamine, in the presence of dimerized rosin. The pigments obtainable are notable for their outstanding coloristic and rheological properties and are suitable for use in a variety of applications.