US2602885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio signaling
Assignee: Individual
•
Filing: 1946-03-30
•
Granted: 1952-07-08
•
Expires: 1966-03-30
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:50
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/28; H04H20/30; H04H20/31; G; G04; G04C; G04C23/00; H04B; H04B14/00; H04B14/002; H04B14/006; H04H60/00; H04H60/09; H04H60/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2404338A
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US2321651A
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US2431306A
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US2370216A
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US2479305A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |