US2625613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone interrupter for audiometers
Assignee: MAICO Co Inc
•
Filing: 1950-10-04
•
Granted: 1953-01-13
•
Expires: 1970-10-04
Abstract
No abstract record available.
Inventors
- 👤 Fred E Barron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:25
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1869536A
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US2006052A
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US2229206A
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US2229089A
Cited
US2287401A
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US2257263A
Cited
US2507432A
Cited
US2471136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |