US2912485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic teletypewriter station control system
Assignee: AT&T Inc
•
Filing: 1957-04-05
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Granted: 1959-11-10
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Kaufman
- 👤 Clarence J Votaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:57
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/40
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |