US2806951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling between microwave amplifier and wave guide
Assignee: Telefunken AG
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Filing: 1952-12-03
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Granted: 1957-09-17
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Expires: 1972-12-03
Abstract
No abstract record available.
Inventors
- 👤 Dipl-Ing Erwin Willwacher
- 👤 Dipl-Ing Herbert Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:01
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0616; H01; H01P; H01P5/00; H01P5/02; H03B; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835; H03B9/00; H03B9/01; H03D9/065; H03F; H03F3/00; H03F3/54; H03F3/60; H03H; H03H2/00; H03H2/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |