US2858424A
Expired / Lapsed
US
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Transistor amplifier with automatic collector bias means responsive to signal level for gain control
Assignee: General Electric Co
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Filing: 1954-10-01
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Granted: 1958-10-28
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Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Stern
- 👤 John A Raper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:08
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |