Patent US1776309A successfully refreshed from Google Patents.
US1776309A
Expired / Lapsed
US
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Oil-insulated electrical device
Assignee: General Electric Co
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Filing: 1929-01-10
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Granted: 1930-09-23
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Expires: 1949-01-10
Abstract
No abstract record available.
Inventors
- 👤 Frank M Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:26
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/12; H01F27/14
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) | 1933-09-22 | 1934-03-24 | 1934-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-09-22 | 1938-03-24 | 1938-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-09-22 | 1942-03-24 | 1942-09-23 | $7700.00 | Window Closed / Lapsed |