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US2804932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid
Assignee: Individual
•
Filing: 1956-09-14
•
Granted: 1957-09-03
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Expires: 1976-09-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Bedard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:35
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/65; H04R25/652; A; A61; A61F; A61F11/00; A61F11/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1752252A
Cited
US1908850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |