Patent · US Expired

Photographically useful chalcogenazolium polymethine dyes

US4575483A · kind A · utility

2Cited by

9References

48Claims

0Family size

Assignee

EASTMAN KODAK COMPANY · US

Inventors

Wolfgang H. H. Gunther · Hersbruck, DE
John D. Mee · Rochester, US

Key dates

Filing date	Feb 19, 1985
Grant date	Mar 11, 1986
Priority date	—
Expiry date	Feb 19, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B23/06
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Polymethine dyes are disclosed containing a tellurazolium nucleus which is substituted at its 2-position with methine chain which is in turn substituted at its .beta. position with a dye property modifier. These dyes can be used in photographic elements to facilitate image formation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.