US2690340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound recording or reproducing apparatus
Assignee: EMI Ltd
•
Filing: 1950-09-20
•
Granted: 1954-09-28
•
Expires: 1970-09-20
Abstract
No abstract record available.
Inventors
- 👤 Harrison Henry Milburn
- 👤 Driscoll John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:12
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B25/00; G11B25/04; G11B25/043; G11B5/00; G11B5/127; G11B5/325; G11B5/48; G11B5/58; G11B5/596
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US893277A
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US1027350A
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US2005074A
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US2262732A
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US2254839A
Cited
US2416135A
Cited
US2567092A
Cited
US2535495A
Cited
US2535498A
Cited
US2589035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |