US2430738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical transformer
Assignee: Essex Wire Corp
•
Filing: 1945-12-20
•
Granted: 1947-11-11
•
Expires: 1965-12-20
Abstract
No abstract record available.
Inventors
- 👤 Donald O Schwennesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
H; H01; H01F; H01F19/00; H01F19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2038992A
Cited
US2390800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |