US2616969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency shift radio telegraph receiver
Assignee: Individual
•
Filing: 1948-10-18
•
Granted: 1952-11-04
•
Expires: 1968-10-18
Abstract
No abstract record available.
Inventors
- 👤 George J Maki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:18
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2186895A
Cited
US2134757A
Cited
US2265826A
Cited
US2302834A
Cited
US2406034A
Cited
US2457207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |