Patent US3008103A successfully refreshed from Google Patents.
US3008103A
Expired / Lapsed
US
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Electric filter
Assignee: Telefunken AG
•
Filing: 1958-09-10
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Granted: 1961-11-07
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Expires: 1978-09-10
Abstract
No abstract record available.
Inventors
- 👤 Maurer Robert
- 👤 Sittner Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:48
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/207; H01P1/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2428272A
Cited
US2513761A
Cited
US2753530A
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US2795699A
Cited
US2903659A
Cited
US2798206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |