Patent US3679449A successfully refreshed from Google Patents.
US3679449A
Expired / Lapsed
US
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Credit card and method of polishing
Assignee: Pitney Bowes Inc
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Filing: 1970-07-27
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Granted: 1972-07-25
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Expires: 1990-07-27
Abstract
Abstract A GLOSSY 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 MARKET 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 LOCATION OF THE LUMINESCENT SPOTS IN THIS MANNER, THE CARD IS TREATED, AFTER LUMINESCENT PRINTING, BY A HEAT PROCESS TO REPOLISH THE LOCATIONS WHERE PRINTING TOOK PLACE, MAKING THEM INDISTINGUISHABLE FROM THE BACKGROUND UNDER VISIBLE LIGHT.
Inventors
- 👤 Marc N Nagot
- 👤 Frederic E Zucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:24
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/36; B42D25/378; B42D25/387; B41; B41M; B41M3/00; B41M3/14; B41M3/144; B42D25/40; B42D25/405; B42D25/415; B42D25/425; G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; Y; Y10; Y10S; Y10S283/00; Y10S283/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |