US3015780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor class-b biasing circuits
Assignee: US Philips Corp
•
Filing: 1955-02-16
•
Granted: 1962-01-02
•
Expires: 1975-02-16
Abstract
No abstract record available.
Inventors
- 👤 Schayes Raymond Georges
- 👤 Ensink Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:11
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2269590A
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US2339466A
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US2552588A
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US2651685A
Cited
US2783314A
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US2644894A
Cited
US2777905A
Cited
US2791644A
Cited
US2924778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |