US2867720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication reliability apparatus
Assignee: Individual
•
Filing: 1945-10-26
•
Granted: 1959-01-06
•
Expires: 1965-10-26
Abstract
No abstract record available.
Inventors
- 👤 Conrad H Hoeppner
- 👤 Jr Carl Harrison Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:18
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2023446A
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US1942884A
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US2272070A
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US2388733A
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US2365284A
Cited
US2430038A
Cited
US2451484A
Cited
US2404814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |