USRE21116E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer
Assignee: —
•
Filing: 1938-06-28
•
Granted: 1939-06-13
•
Expires: 1958-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:45
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F3/00; H01F3/10; H01F3/12; H04; H04B; H04B3/00; H04B3/02; H04B3/32; H04B3/46; H04J; H04J1/00; H04J1/02; H04J1/16
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) | 1942-06-12 | 1942-12-12 | 1943-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-12 | 1946-12-12 | 1947-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-12 | 1950-12-12 | 1951-06-13 | $7700.00 | Window Closed / Lapsed |