US2967908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph communication systems with carrier monitoring
Assignee: TDK Micronas GmbH
•
Filing: 1959-04-28
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Granted: 1961-01-10
•
Expires: 1979-04-28
Abstract
No abstract record available.
Inventors
- 👤 Richard E Gray
- 👤 George Q Mccoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:33
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/20; H04L1/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1723220A
Cited
US1749048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |