Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2008-07-01
2008-07-01
Aulakh, Charanjit S (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C546S098000
Reexamination Certificate
active
07393956
ABSTRACT:
A process for preparing perylene-3,4:9,10-tetracarboxylic diimides of the general formula Icomprisingdimerizing a naphthalene-1,8-dicarboximide of the formula IIin a reaction medium consisting essentially of an apolar aprotic organic solvent and an alkali metal base and subsequently reoxidizing the resulting alkali metal salt of the leuco form of the perylene-3,4:9,10-tetracarboxylic diimide in the presence of a polar solvent.
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Boehm Arno
Dung Bernhard
Helfer Willi
Henning Georg
Mueller Felix
Aulakh Charanjit S
BASF - Aktiengesellschaft
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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