US2696599A
Expired / Lapsed
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Assignee: AT&T Inc
•
Filing: 1953-02-12
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Granted: 1954-12-07
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Expires: 1973-02-12
Abstract
No abstract record available.
Inventors
- 👤 Bernard D Holbrook
- 👤 William A Malthaner
- 👤 Henry E Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:39
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2183147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |