US2952748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binaural eyeglass hearing aid construction
Assignee: Beltone Hearing Aid Co
•
Filing: 1955-06-21
•
Granted: 1960-09-13
•
Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Posen Sam
- 👤 Louis A Mcnabb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:09
CPC Classifications
G; G02; G02C; G02C11/00; G02C11/06; H; H01; H01M; H01M50/00; H01M50/20; H01M50/204; H01M50/207; H01M50/216; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
BE526640A
Cited
US2207705A
Cited
US2545731A
Cited
US2568919A
Cited
FR990602A
Cited
US2613282A
Cited
GB723981A
Cited
US2765373A
Cited
US2896024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |