Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1994-12-01
1997-12-02
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 62, 524198, 524277, 524563, 524403, 523161, 260DIG38, 106 21A, 106 23D, C08K 534, C08L 9106
Patent
active
056936931
ABSTRACT:
Wax based invisible inks have been discovered that emit light at various wavelengths in the visible region when they are excited by UV light. This allows lower layer clear text information to be written on an object with a regular, visible ink and an upper layer bar code to be written over the lower layer text information with an ink that is invisible to the naked eye. This allows the lower layer text information and upper layer bar code to contain more information than conventional bar codes. These inks allow printing and decoding invisible bar codes over printed information with visible inks. The detection by fluorescence of these invisible inks provides a high signal to noise ratio and no interference with the visible printed information.
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patent: 5431697 (1995-07-01), Kamata et al.
George Kallistratos "Fluorescent Properties of Aromatic Complexes with Rare Earths And Other Elements of the III .alpha.-Group" May 24, 1982 Chimka Chronika, New Series 11 249-266.
Ingmar Grenthe "Stability Relationships Among The Rare Earth Dipicolinates" Jan. 20, 1961.
Auslander Judith D.
Berson William
Guarriello John J.
Michl Paul R.
Pitney Bowes Inc.
Reichman Ronald
Scolnick Melvin J.
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