US2989625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyed high frequency transmitters
Assignee: Electronique Appliquee SA
•
Filing: 1957-06-14
•
Granted: 1961-06-20
•
Expires: 1977-06-14
Abstract
No abstract record available.
Inventors
- 👤 Paul D Buffet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:11
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/04; H04L15/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1563084A
Cited
US2134562A
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US2422337A
Cited
GB550430A
Cited
US2448787A
Cited
US2425297A
Cited
US2459281A
Cited
US2785223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |