US1924469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull amplifier
Assignee: Siemens and Halske AG
•
Filing: 1932-01-02
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Granted: 1933-08-29
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Expires: 1952-01-02
Abstract
No abstract record available.
Inventors
- 👤 Strecker Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:42
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; H03F3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-08-28 | 1937-02-27 | 1937-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-28 | 1941-02-27 | 1941-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-28 | 1945-02-27 | 1945-08-29 | $7700.00 | Window Closed / Lapsed |