US2869123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly discriminating radio frequency receiver
Assignee: PERMA POWER CO
•
Filing: 1954-11-08
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Granted: 1959-01-13
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Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Goldstein Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:57
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/12; E; E05; E05F; E05F15/00; E05F15/70; E05F15/77
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1759952A
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US1902031A
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US2173427A
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US2392672A
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US2604518A
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US2603748A
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US2560320A
Cited
US2654032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |