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US1825551A
Expired / Lapsed
US
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Electrical recording
Assignee: General Electric Co
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Filing: 1930-06-18
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Granted: 1931-09-29
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Expires: 1950-06-18
Abstract
No abstract record available.
Inventors
- 👤 Serrell Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:54
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/23; B; B41; B41M; B41M5/00; B41M5/24; B41M5/245; B43; B43K; B43K8/00; B43K8/22; Y; Y10; Y10S; Y10S101/00; Y10S101/37
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) | 1934-09-28 | 1935-03-30 | 1935-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-09-28 | 1939-03-30 | 1939-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-09-28 | 1943-03-30 | 1943-09-29 | $7700.00 | Window Closed / Lapsed |