US3491344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical readout of records utilizing a record medium with conductive reference lines and a conductive marking line
Assignee: Individual
•
Filing: 1967-05-15
•
Granted: 1970-01-20
•
Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 David Ferber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:56
CPC Classifications
G; G06; G06K; G06K11/00; G06K7/00; G06K7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1396178A
Cited
US2614327A
Cited
US3147461A
Cited
US3230358A
Cited
US3360636A
Cited
US3307019A
Cited
US3296613A
Cited
US3355741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |