US2677761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system
Assignee: United States Department of the Navy
•
Filing: 1945-11-26
•
Granted: 1954-05-04
•
Expires: 1965-11-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward F Macnichol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:39
CPC Classifications
H; H03; H03K; H03K9/00; H03K9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266401A
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US2199634A
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US2433407A
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US2462110A
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US2455265A
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US2391776A
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US2516356A
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US2508620A
Cited
US2482544A
Cited
US2532338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |