Chromogenic dihydroquinazolines

Details Chromogenic dihydroquinazolines Chromogenic dihydroquinazolines

1984-12-07

1985-12-31

Hess, Bruce H.

Recorders

Record receiver deforming

346223, 346224, 427151, B41M 516, B41M 518, B41M 522

Patent

active

045624496

ABSTRACT:
The invention relates to chromogenic dihydroquinazolines of the general formula: ##STR1## wherein: the ring A is a monocyclic or polycyclic, unsubstituted or substituted heterocyclic radical which may contain further heteroatoms as ring members,

REFERENCES:
patent: 4020068 (1977-04-01), Farber
patent: 4183932 (1980-01-01), Yamamoto et al.
patent: 4435003 (1984-03-01), Fletcher

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