US3015074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized d. c. amplifier
Assignee: Systron Donner Corp
•
Filing: 1959-01-16
•
Granted: 1961-12-26
•
Expires: 1979-01-16
Abstract
No abstract record available.
Inventors
- 👤 David A Taskett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297543A
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GB529044A
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US2256085A
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US2386892A
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US2443864A
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US2430699A
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US2581456A
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US2709205A
Cited
US2731519A
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US2677729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |