US2886623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery assembly for hearing aids
Assignee: DICTOGRAPH PRODUCTS CO Inc
•
Filing: 1954-03-24
•
Granted: 1959-05-12
•
Expires: 1974-03-24
Abstract
No abstract record available.
Inventors
- 👤 Philip N Lehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/20; H01M50/204; H01M50/247; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1464573A
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US2197314A
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GB569482A
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US2449568A
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US2495476A
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US2668197A
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US2651745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |