US2678581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal comparison apparatus
Assignee: RCA Corp
•
Filing: 1949-11-30
•
Granted: 1954-05-18
•
Expires: 1969-11-30
Abstract
No abstract record available.
Inventors
- 👤 John H Reisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:19
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1816047A
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US1932337A
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US2412423A
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US2442298A
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US2442910A
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US2431510A
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US2471249A
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US2434497A
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US2474098A
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US2492901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |