US2505210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination acoustic and electrical telephone pickup
Assignee: Individual
•
Filing: 1948-12-15
•
Granted: 1950-04-25
•
Expires: 1968-12-15
Abstract
No abstract record available.
Inventors
- 👤 Louis S Scher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:37
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21; H04M1/215
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US431810A
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US452775A
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US847691A
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US1204136A
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US966467A
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US1567683A
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US1560303A
Cited
GB279126A
Cited
US2160829A
Cited
US2179445A
Cited
US2204529A
Cited
US2268665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |