US2695332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way multichannel carrier wave transmission
Assignee: AT&T Inc
•
Filing: 1950-07-26
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Granted: 1954-11-23
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Expires: 1970-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert S Caruthers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:06
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678203A
Cited
US1607682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |