Patent US3069635A successfully refreshed from Google Patents.
US3069635A
Expired / Lapsed
US
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Filter arrangement for very short electro-magnetic waves
Assignee: Siemens and Halske AG
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Filing: 1959-09-21
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Granted: 1962-12-18
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Expires: 1979-09-21
Abstract
No abstract record available.
Inventors
- 👤 Eickhoff Hans-Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:15
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/213; H01P1/2133; H01P1/201; H01P1/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899650A
Cited
US2485606A
Cited
US2594055A
Cited
US2641646A
Cited
US2844801A
Cited
US2915716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |