US2634366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light repeater for pulse communication systems
Assignee: AT&T Inc
•
Filing: 1947-11-28
•
Granted: 1953-04-07
•
Expires: 1967-11-28
Abstract
No abstract record available.
Inventors
- 👤 Luther G Schimpf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:58
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/29; G; G02; G02F; G02F1/00; G02F1/01; G02F1/07; G02F1/076
Claims Analysis
Total Claims: 0
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US2425315A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |