Chromogenic recording materials

Details Chromogenic recording materials Chromogenic recording materials

1984-02-23

1986-05-20

Hess, Bruce H.

Recorders

Record receiver deforming

346217, 346221, 427151, B41M 516, B41M 518, B41M 522

Patent

active

045904987

ABSTRACT:
Chromogenic recording materials which utilizes a fluoran compound of the formula ##STR1## wherein R is methyl or ethyl, is described.

REFERENCES:
patent: 2548366 (1951-04-01), Green et al.
patent: 2800458 (1957-07-01), Green
patent: 3681390 (1972-08-01), Lin

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