US3067389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor in-phase current amplifier
Assignee: International Business Machines Corp
•
Filing: 1958-07-31
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Granted: 1962-12-04
•
Expires: 1978-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hannon S Yourke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:23
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3066; H03F3/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2641717A
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US2789164A
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US2791645A
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US2808471A
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US2858379A
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US2860195A
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US2847519A
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US2852625A
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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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |