Patent US4687791A successfully refreshed from Google Patents.
US2959639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission at reduced bandwith
Assignee: AT&T Inc
•
Filing: 1956-03-05
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Granted: 1960-11-08
•
Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 John R Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:23
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66; H04N; H04N7/00; H04N7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2202605A
Cited
CH249516A
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US2801281A
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US2510054A
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US2521733A
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US2662118A
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US2676202A
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US2664462A
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US2697201A
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US2567691A
Cited
US2605361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |