US2956115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facsimile transmission system with modification of intermediate time signal
Assignee: AT&T Inc
•
Filing: 1957-08-12
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Granted: 1960-10-11
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Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 John R Hefele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:43
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/04; H03K5/22; H03K5/26; H04; H04N; H04N1/00; H04N1/00095; H04N1/40; H04N1/409; H04N1/4092; H04N1/41; H04N1/411
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |