US2622241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for calibrating frequency modulated radar equipment
Assignee: RCA Corp
•
Filing: 1946-02-25
•
Granted: 1952-12-16
•
Expires: 1966-02-25
Abstract
No abstract record available.
Inventors
- 👤 Eugene O Keizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:18
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4052; G01S7/4056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21955E
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US2176742A
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US2423644A
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US2248599A
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US2324077A
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US2421016A
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US2408742A
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US2433804A
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US2422064A
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US2420211A
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US2418538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |