Pressure sensitive copy paper employing pyrazoloxanthene compoun

Details Pressure sensitive copy paper employing pyrazoloxanthene compoun Pressure sensitive copy paper employing pyrazoloxanthene compoun

1975-05-07

1976-10-26

Albrecht, Dennis L.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

282 275, 427151, 428407, 428411, 428537, 428913, 428914, B41M 514, B41M 516, B41M 518, B41M 522

Patent

active

039884929

ABSTRACT:
This invention discloses novel pyrazoloxanthene compounds, useful as the color-formers or imaging sources in pressure-sensitive copy papers and in thermally-sensitive imaging papers, and a process for preparing these compounds.

REFERENCES:
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patent: 2800457 (1957-07-01), Green
patent: 3244549 (1966-04-01), Farnham
patent: 3501331 (1970-05-01), Kimura
patent: 3506471 (1970-04-01), Kimura
patent: 3514310 (1970-05-01), Kimura
patent: 3624107 (1971-11-01), Lin
patent: 3705049 (1972-12-01), Busch
patent: 3824119 (1974-07-01), Terayama
patent: 3837889 (1974-09-01), Hughes

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