Patent US3059190A successfully refreshed from Google Patents.
US3059190A
Expired / Lapsed
US
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Pre-amplifier
Assignee: Individual
•
Filing: 1958-08-18
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Granted: 1962-10-16
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Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 Hafler David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:30
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/02; H03G5/04; H03G5/06; H03G5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1077456A
Cited
US2323634A
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US2264715A
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US2282870A
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US2281238A
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US2514267A
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US2553673A
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US2589723A
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US2695337A
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US2679553A
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US2775656A
Cited
US2752432A
Cited
US2994040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |