Patent US3544769A successfully refreshed from Google Patents.
US3544769A
Expired / Lapsed
US
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Electronic identification and credit card system
Assignee: DIGITAL IDENTIFICATION SYSTEMS Inc
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Filing: 1967-04-05
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Granted: 1970-12-01
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Expires: 1987-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert A Hedin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:33
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/20; G06F13/22; G06F3/00; G06F3/01; G06F3/048; G06F3/0487; G06F3/0489; G06K; G06K19/00; G06K19/06; G06K19/067; G06Q; G06Q20/00; G06Q20/38; G06Q20/40; G06Q20/403; G06Q20/4037; G06Q40/00; G06Q40/02; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00706; G07C9/00896; G07C9/00904; G07F; G07F7/00; G07F7/08
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) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |