Credit card and method of luminescent printing
Abstract
Abstract A PLASTIC CREDIT CARD IS TO BE IMPRINTED WITH A LUMINESCENT SPOT CODE READABLE UNDER ULTRA-VIOLET RADIATION FOR USE IN VERIFICATION OF THE SUBSCRIBER''S ACCOUNT. THE LUMINESCENT MARKER MATERIAL EMPLOYED FOR THIS PURPOSE IS BORNE IN A SOLVENT WHICH ATTACKS THE MATERIAL OF THE CREDIT CARD, PRODUCING A SURFACE ETCHING EFFECT WHICH IS VISIBLE UNDER ORDINARY LIGHT. TO AVOID BETRAYING THE EXISTENCE AND LOCATIONS OF THE LUMINESCENT SPOTS IN THIS MANNER, THE CARD IS TREATED, PRIOR TO LUMINESCENT PRINTING, WITH A SOLVENT MATE- RIAL TO PRODUCE A SIMILAR ETCHING EFFECT OVER AN ENTIRE BACKGROUND AREA. THE LOCATIONS WHERE PRINTING SUBSEQUENTLY TAKES PLACE ARE THEN INDISTINGUISHABLE FROM THE BACKGROUND UNDER VISIBLE LIGHT.
Inventors
- 👤 Herbert Tramposch
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |