Patent US2115842A successfully refreshed from Google Patents.
US2115842A
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US
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Volume control arrangement
Assignee: EMI Ltd
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Filing: 1934-03-14
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Granted: 1938-05-03
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Expires: 1954-03-14
Abstract
No abstract record available.
Inventors
- 👤 Cooper Arthur Henry
- 👤 Corner William Cuthbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:13
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/02; H03G3/14; H03G3/16
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) | 1941-05-02 | 1941-11-01 | 1942-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-05-02 | 1945-11-01 | 1946-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-05-02 | 1949-11-01 | 1950-05-03 | $7700.00 | Window Closed / Lapsed |