US3505569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductive circuit component
Assignee: Telefunken Patentverwertungs GmbH
•
Filing: 1967-09-15
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Granted: 1970-04-07
•
Expires: 1987-09-15
Abstract
No abstract record available.
Inventors
- 👤 Sigfrid Schweizerhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:53
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/0006; H01F2017/0053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB421353A
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US2584592A
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US2850707A
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US2948871A
Cited
GB993265A
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US3292127A
Cited
FR1400674A
Cited
US3325760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |