Patent US2245099A successfully refreshed from Google Patents.
US2245099A
Expired / Lapsed
US
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Storage battery for hearing-aid apparatus
Assignee: Koehler Manufacturing Co
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Filing: 1938-05-19
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Granted: 1941-06-10
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Expires: 1958-05-19
Abstract
No abstract record available.
Inventors
- 👤 Wheat Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:16
CPC Classifications
H; H01; H01M; H01M50/00; H04; H04R; H04R25/00; H04R25/04; H04R2225/00; H04R2225/31; H04R25/60; H04R25/604; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1944-06-09 | 1944-12-09 | 1945-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-09 | 1948-12-09 | 1949-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-09 | 1952-12-09 | 1953-06-10 | $7700.00 | Window Closed / Lapsed |