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. 17, 1998
Filed:
Jan. 24, 1997
Applicant:
Inventors:
Ian Alexander Macpherson, Paisley, GB;
Iain Frank Fraser, Kilbirnie, GB;
Peter Cyril White, Glasgow, GB;
William Ewen Smith, Glasgow, GB;
Calum Hugh Munro, Pittsburgh, PA (US);
Assignee:
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
106413 ; 106 3175 ; 106 3176 ; 106 3177 ; 106 3178 ; 106 3179 ; 106 318 ; 106 3181 ; 106410 ; 106411 ; 106493 ; 106494 ; 106495 ; 106496 ; 106497 ; 106498 ; 162134 ; 101491 ; 264 78 ; 264134 ; 283 91 ; 427197 ; 428195 ; 902-7 ; 902 28 ;
Abstract
The invention provides a pigment composition comprising a pigment having adsorbed on its surface, or as a physical mixture, up to 10% by weight, based on the total weight of pigment composition of a coding compound which is a compound containing an azo, azomethine or polycyclic chromophore and which has an absorption spectrum and a Raman spectrum different from that of the pigment. The compositions are suitable for use in printing inks for security applications.