US2800634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency transmission waveguides
Assignee: TDK Micronas GmbH
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Filing: 1954-04-27
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Granted: 1957-07-23
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Expires: 1974-04-27
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
- 👤 Herbert F Engelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; H01B; H01B11/00; H01B11/18; H01B11/20; H01P3/084; H01Q; H01Q13/00; H01Q13/20; H01Q13/26; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0237; H05K1/024; H05K2201/00; H05K2201/07; H05K2201/0707; H05K2201/0715
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) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |