Compositions – Organic luminescent material containing compositions – Optical brightening compositions
Patent
1982-12-20
1985-07-02
Demers, Arthur P.
Compositions
Organic luminescent material containing compositions
Optical brightening compositions
250361R, 2504831, 25230116, 25230117, 25230134, 25230135, 548159, 548224, C09K 1102, C09K 1106
Patent
active
045267057
ABSTRACT:
Light-collecting system, characterized in that it contains a coumarin derivative of the formula ##STR1## in which T designates O or NR.sub.4, wherein R.sub.4 represents hydrogen, optionally substituted alkyl or optionally substituted aryl;
REFERENCES:
patent: 3521187 (1970-07-01), Snavely et al.
patent: 4035740 (1977-07-01), Schafer et al.
Arndt Frank
Claussen Uwe
Harnisch Horst
Schellhammer Carl-Wolfgang
Bayer Aktiengesellschaft
Demers Arthur P.
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