US3533071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transfer system and method
Assignee: AT&T Inc
•
Filing: 1967-04-12
•
Granted: 1970-10-06
•
Expires: 1987-04-12
Abstract
No abstract record available.
Inventors
- 👤 Barry M Epstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:37
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/12; G11B20/1201; G11B20/1202; G11B20/1205; G06; G06K; G06K1/00; G06K1/14; G11B15/00; G11B15/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2976372A
Cited
US3028454A
Cited
US3064516A
Cited
US3315242A
Cited
US3206133A
Cited
US3365702A
Cited
US3405238A
Cited
US3260340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |