US2712753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency measuring apparatus
Assignee: Collins Radio Co
•
Filing: 1950-07-10
•
Granted: 1955-07-12
•
Expires: 1970-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert L Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:55
CPC Classifications
G; G01; G01H; G01H13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2105479A
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US2280226A
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US2320390A
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US2461543A
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US2384716A
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US2486984A
Cited
US2439131A
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US2484623A
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US2490273A
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US2615981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |