US2893809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring system for wave signal receivers
Assignee: TNC US Holdings Inc
•
Filing: 1955-11-29
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Granted: 1959-07-07
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Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Henry A Rahmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/35; H04H60/38; H04H60/39; H04H60/41; H04H60/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2175937A
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US2210380A
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US2244818A
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US2213886A
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US2305834A
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US2526610A
Cited
US2521564A
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US2645549A
Cited
US2801896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |