US2500301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded chassis for hearing aid apparatus
Assignee: Paravox Inc
•
Filing: 1945-12-21
•
Granted: 1950-03-14
•
Expires: 1965-12-21
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 07:11
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/04; H04R25/65
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1630028A
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US1805362A
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US1811638A
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FR834981A
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US2268619A
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US2176671A
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US2308550A
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US2336828A
Cited
US2333028A
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US2306701A
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US2327320A
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US2327321A
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US2444302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |