US2496483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud-speaker with diaphragm an integral part of outer casing
Assignee: Individual
•
Filing: 1945-07-23
•
Granted: 1950-02-07
•
Expires: 1965-07-23
Abstract
No abstract record available.
Inventors
- 👤 Massa Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:07
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1593377A
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US1636410A
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US1677945A
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US1558191A
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US1728039A
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US1931236A
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US1800573A
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US1824664A
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US2181132A
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US2086630A
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US2204183A
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US2402480A
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US2444061A
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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) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |