US2490667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-speed phonograph turntable drive utilizing two motors
Assignee: Philips Home Products Inc
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Filing: 1948-08-23
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Granted: 1949-12-06
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Expires: 1968-08-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Wilton E Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:35
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19014; Y10T74/19023; Y10T74/19042; Y10T74/19614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |