Chromogenic copy system

Details Chromogenic copy system Chromogenic copy system

1980-07-29

1981-12-01

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

282 275, 427150, 427151, 427152, 427261, 428211, 428307, 428342, 428537, 428914, B32B 516, B41L 120

Patent

active

043037194

ABSTRACT:
A pressure-sensitive chromogenic copy system utilizing a color developer capable of reacting with a chromogen to form a color image, said color developer comprising sulfur, sulfonyl, or sulfone derivatives of substituted aromatic carboxylic acids, preferably hydroxybenzoic acids.

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patent: 4234212 (1980-11-01), Kato et al.
patent: 4239815 (1980-12-01), Kato et al.
patent: 4260179 (1981-04-01), Yamaguchi et al.

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