US2756397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer
Assignee: General Electric Co
•
Filing: 1952-07-25
•
Granted: 1956-07-24
•
Expires: 1972-07-25
Abstract
No abstract record available.
Inventors
- 👤 Curtiss M Cederstrom
- 👤 Lloyd S Blair
- 👤 John C Russ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:25
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/30; H01F27/306
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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |