US3061689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid
Assignee: Beltone Hearing Aid Co
•
Filing: 1957-05-27
•
Granted: 1962-10-30
•
Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Stuart G Mccarrell
- 👤 Harry A Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:06
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/45; H04R25/60; H04R25/604; H04R25/606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2430229A
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US2529562A
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DE922889C
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US2787670A
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US2843671A
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US2939923A
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US2860195A
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US2824177A
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US2874231A
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FR1142120A
Cited
US2950357A
Cited
US2959645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |