Patent US1967250A successfully refreshed from Google Patents.
US2585191A
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US
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Hearing aid apparatus having sectional casing
Assignee: Paravox Inc
•
Filing: 1947-07-21
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Granted: 1952-02-12
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Expires: 1967-07-21
Abstract
No abstract record available.
Inventors
- 👤 Raleigh E Tresise
- 👤 Paul D Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:09
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/04; Y; Y10; Y10T; Y10T24/00; Y10T24/13; Y10T24/1321; Y10T24/1324; Y10T24/1353
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2083356A
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US2086534A
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US2089812A
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US2133651A
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US2336828A
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US2406583A
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US2424422A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |