Patent US2765373A successfully refreshed from Google Patents.
US2765373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid, construction and support therefor
Assignee: Individual
•
Filing: 1951-02-20
•
Granted: 1956-10-02
•
Expires: 1971-02-20
Abstract
No abstract record available.
Inventors
- 👤 Alonzo L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:27
CPC Classifications
G; G02; G02C; G02C11/00; G02C11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1820357A
Cited
US1897833A
Cited
US2020832A
Cited
US2100606A
Cited
US2207705A
Cited
GB541226A
Cited
US2566313A
Cited
US2613282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |