US4396806B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid amplifier
Assignee: Sivantos Inc
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Filing: 1980-10-20
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Granted: 1998-06-02
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Expires: 2000-10-20
Abstract
No abstract record available.
Inventors
- 👤 Jared A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:29
CPC Classifications
H; H03; H03G; H03G3/00; H03G5/00; H03G5/02; H03G5/025; H04; H04R; H04R25/00; H04R25/35; H04R25/356; H04R25/50; H04R25/505
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) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |