Patent EP0499735A2 successfully refreshed from Google Patents.
US2931986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor push-pull amplifying circuit-arrangements
Assignee: US Philips Corp
•
Filing: 1956-02-29
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Granted: 1960-04-05
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Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Ensink Johannes
- 👤 Klaassen Anne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:00
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3066; H03F3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2115858A
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US2103468A
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DE831415C
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US2691075A
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US2805289A
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US2782267A
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US2812393A
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US2761917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |