Patent US2831114A successfully refreshed from Google Patents.
US2831114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier with bias stabilization
Assignee: US Philips Corp
•
Filing: 1955-10-27
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Granted: 1958-04-15
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Expires: 1975-10-27
Abstract
No abstract record available.
Inventors
- 👤 Adrianus Johannes Wilhel Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:21
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/302; G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; G04C3/065; G04C3/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2680160A
Cited
FR1090564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |