US4988952B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
High q switched capacitor filter having internal thin-film resistors
Assignee: Analog Devices International ULC
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Filing: 1989-06-06
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Granted: 1995-10-31
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Expires: 2009-06-06
Abstract
No abstract record available.
Inventors
- 👤 Nello G Sevastopoulos
- 👤 Robert C Dobkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:47
CPC Classifications
H; H03; H03H; H03H19/00; H03H19/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-30 | 1999-05-01 | 1999-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-30 | 2003-05-01 | 2003-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-30 | 2007-05-01 | 2007-10-31 | $7700.00 | Window Closed / Lapsed |