US3514726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse controlled frequency filter
Assignee: Siemens AG
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Filing: 1967-01-24
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Granted: 1970-05-26
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Expires: 1987-01-24
Abstract
No abstract record available.
Inventors
- 👤 Werner Poschenrieder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:32
CPC Classifications
H; H03; H03K; H03K9/00; H03K9/04; G; G01; G01R; G01R23/00; G01R27/00; G01R27/28; G01R27/32; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G11; G11C; G11C27/00; G11C27/02; G11C27/024; H03C; H03C1/00; H03H; H03H19/00; H03H19/002; H03H19/004
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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |