US2878310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way television over telephone lines
Assignee: AT&T Inc
•
Filing: 1955-05-05
•
Granted: 1959-03-17
•
Expires: 1975-05-05
Abstract
No abstract record available.
Inventors
- 👤 Floyd K Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/14; H04N7/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2017883A
Cited
US2202605A
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US2314471A
Cited
US2321611A
Cited
US2629011A
Cited
US2629010A
Cited
US2786887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |