Paper making and fiber liberation – Processes and products – Safety – identification and fraud preventing paper
Patent
1990-08-06
1992-06-23
Jones, W. Gary
Paper making and fiber liberation
Processes and products
Safety, identification and fraud preventing paper
162162, 162158, 1621812, 162165, D21H 1700
Patent
active
051239990
ABSTRACT:
A forgery proof safety paper comprises, on its surface and/or in the body of a paper substrate, at least one compound of the formula ##STR1## wherein R.sub.1 is H or OH, and R.sub.2 is H, COOH, CHO, COR, COOR or alkyl, R being a substituted or unsubstituted, linear, cyclic or aromatic hydrocarbon chain.
REFERENCES:
patent: 227559 (1880-05-01), McMahon et al.
patent: 305292 (1884-09-01), Clapp
patent: 1864116 (1932-06-01), Bausch et al.
Whistler, Roy L. Industrial Guns: Polysaccharides and Their Derivatives, New York, Academic Press, 1959, pp. 265-266.
Honnorat Andre
Riou Claude
Aussedat-Rey
Jones W. Gary
Lamb Brenda
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