Patent US1856730A successfully refreshed from Google Patents.
US1856730A
Expired / Lapsed
US
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Plano loud speaker
Assignee: Aeolian Co
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Filing: 1929-05-31
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Granted: 1932-05-03
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Expires: 1949-05-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Emilius W Scherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:54
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/02; H04R1/028; G; G10; G10C; G10C1/00; G10C1/04; G10C3/00; G10C3/02; G10C3/06; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2811
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-05-03 | 1935-11-02 | 1936-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-03 | 1939-11-02 | 1940-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-03 | 1943-11-02 | 1944-05-03 | $7700.00 | Window Closed / Lapsed |