US2558110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase transformer core
Assignee: Westinghouse Electric Corp
•
Filing: 1948-05-15
•
Granted: 1951-06-26
•
Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
- 👤 Gerhard M Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:57
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2293951A
Cited
US2367927A
Cited
US2374449A
Cited
US2447673A
Cited
US2456459A
Cited
US2456461A
Cited
US2516164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |