US2978697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reducing the frequency band width of radar frequency mixtures and the like
Assignee: Siemens and Halske AG
•
Filing: 1955-08-15
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Granted: 1961-04-04
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Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Donath Bernhard
- 👤 Zetzmann Hans-Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:08
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66; H04B1/662; G; G01; G01S; G01S7/00; G01S7/003; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/2923; G01S7/2926; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1671143A
Cited
US1671151A
Cited
US2566189A
Cited
US2617094A
Cited
US2619636A
Cited
US2836359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |