US2854530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A. c.-biased amplifier circuit arrangement
Assignee: US Philips Corp
•
Filing: 1954-02-05
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Granted: 1958-09-30
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Pieter Frederik Van Eldik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:31
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; H03F3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1620506A
Cited
US2338410A
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US2339466A
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GB645256A
Cited
US2646469A
Cited
US2616988A
Cited
US2762011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |