US2921124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for reducing television bandwidth
Assignee: AT&T Inc
•
Filing: 1956-12-10
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Granted: 1960-01-12
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:38
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/12; H04N7/122; H04N7/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2321611A
Cited
US2629011A
Cited
US2629010A
Cited
US2652449A
Cited
US2740912A
Cited
US2786887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |