US2689943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency determining unit
Assignee: FRANK S STREETER
•
Filing: 1946-03-28
•
Granted: 1954-09-21
•
Expires: 1966-03-28
Abstract
No abstract record available.
Inventors
- 👤 Rieber Erank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:47
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03H; H03H9/00; H03H9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1863415A
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US1995305A
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US1948104A
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US1920304A
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US1933306A
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US2174296A
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US2260847A
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US2265011A
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US2240306A
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US2327277A
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US2412536A
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US2546158A
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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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |