Patent · US Expired

Bleach

US5565138A · kind A · utility

1Cited by

1References

4Claims

0Family size

Assignee

Agfa NV · BE

Inventors

Norman Klaunzer · Leverkusen, DE
Ralf Wichmann · Bensberg, DE
Gustav Tappe · Leverkusen, DE
Eltjo Boelema · Bathmen, NL

Key dates

Filing date	Oct 27, 1994
Grant date	Oct 15, 1996
Priority date	—
Expiry date	Oct 27, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG03C7/42
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A bleach prepared from an iron (III) complex of a complexing agent of the formula I ##STR1## in which L.sub.1, L.sub.2 mean an optionally substituted alkylene group with 1 to 4 C atoms PA0 L.sub.3 means an alkylene group with 1 to 4 C atoms, PA0 Z.sub.1, Z.sub.2 mean OH, NH.sub.2, NHR.sub.2, PA0 X means N, P.dbd.0, SO.sub.2 H PA0 Y.sub.1 means OH, NH.sub.2, NHR.sub.3, NR.sub.3 R.sub.4, SO.sub.3 H, PO.sub.3 H.sub.2, NHCOR.sub.5, PA0 R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 mean optionally substituted alkyl or optionally substituted phenyl exhibits excellent bleaching action.

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