US2431128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase transformer
Assignee: Line Material Co
•
Filing: 1943-06-04
•
Granted: 1947-11-18
•
Expires: 1963-06-04
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:04
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US400862A
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US1425091A
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US1404826A
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DE340472C
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GB274701A
Cited
US1891178A
Cited
US1935426A
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US2313306A
Cited
US2344294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |