US2105296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid
Assignee: Sonotone Corp
•
Filing: 1934-10-04
•
Granted: 1938-01-11
•
Expires: 1954-10-04
Abstract
No abstract record available.
Inventors
- 👤 Harry A Pearson
- 👤 Nicholides Emmanuel Christ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:14
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/50; H04R25/502; H04R2460/00; H04R2460/13; H04R2499/00; H04R2499/10; H04R2499/11
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) | 1941-01-10 | 1941-07-12 | 1942-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-01-10 | 1945-07-12 | 1946-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-01-10 | 1949-07-12 | 1950-01-11 | $7700.00 | Window Closed / Lapsed |