US1766046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound-reproducing system
Assignee: Federal Telegraph Co
•
Filing: 1929-01-07
•
Granted: 1930-06-24
•
Expires: 1949-01-07
Abstract
No abstract record available.
Inventors
- 👤 John O Prescott
- 👤 Frederick A Kolster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:27
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/03; G11B7/08
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) | 1933-06-23 | 1933-12-23 | 1934-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-23 | 1937-12-23 | 1938-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-23 | 1941-12-23 | 1942-06-24 | $7700.00 | Window Closed / Lapsed |