Forgery-proof safety paper

Details Forgery-proof safety paper Forgery-proof safety paper

1990-05-24

1993-11-23

Jones, W. Gary

Paper making and fiber liberation

Processes and products

Safety, identification and fraud preventing paper

162158, 162162, 427 7, 428916, 252583, 252586, D21H 2146

Patent

active

052640817

ABSTRACT:
This invention relates to the paper-making domain and especially to a forgery-proof safety paper, which includes on its surface and/or in its mass, at least one compound responding to formula: ##STR1## in which: R.sub.1, R.sub.2, R.sub.3 may be either H, OH, or OR,

REFERENCES:
patent: 1864116 (1932-06-01), Bausch et al.
patent: 3464841 (1969-09-01), Skofronick
patent: 3640709 (1972-02-01), Kondo et al.
patent: 4136229 (1979-01-01), Godet et al.
patent: 4362645 (1982-12-01), Hof et al.
patent: 4725497 (1988-02-01), Honnorat et al.

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