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:
Aug. 21, 1990
Filed:
Dec. 23, 1988
Donald R Diehl, Rochester, NY (US);
Ronda E Factor, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Solid particle dispersions of dyes according to the formula: ##STR1## are useful as filter dyes in photographic elements. In this formula, n is 0 or 1. R.sub.1 and R.sub.2 are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, or taken together with R.sub.6, R.sub.7, N and the atoms to which they are attached, represent the atoms necessary to complete a julolydyl ring. R.sub.3 is H, substituted or unsubstituted alkyl, or substituted or unsubstituted aryl. R.sub.4 and R.sub.5 each independently represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, secondary or tertiary amino, CO.sub.2 H, or NHSO.sub.2 R.sub.8, with the proviso that at least one of R.sub.4 and R.sub.5 or a substituted on an aryl ring in R.sub.4 and R.sub.5 is CO.sub.2 H or NHSO.sub.2 R.sub.8. R.sub.8 is substituted or unsubstituted alkyl or substituted or unsubstituted aryl. R.sub.6 and R.sub.7 independently represents H, or R.sub.7 taken together with R.sub.2, or R.sub.6 taken together with R.sub.1, represent the atoms necessary to complete a heterocyclic ring.