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US 6,084,132 AGranted
Fluorescent dyes
AssigneeRohm and Haas Company
InventorPeter J. Heffron
Life of this patent
Estimating the term…
Abstract
Fluorescent dyes which fluoresce in a variety of colors are produced from substituted and un-substituted 6-ring and 8-ring aromatic diketones by reductive alkylation with alkyl halides in the presence of zinc.
Claims2
Fluorescent dyes having the formulae:
- ##STR4## where the Xs are the same or different and are selected from H, Cl, F, I, O-(C1-C8)alkyl, NO.sub.2 and NY.sub.2, where the Ys are the same or different and are selected from H or (C1-C8)alkyl;
- and m=0-4.
Dependencies are inferred from the claim text.