US2993183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer structures
Assignee: Westinghouse Electric Corp
•
Filing: 1957-10-30
•
Granted: 1961-07-18
•
Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Harold R Moore
- 👤 William D Albright
- 👤 Jr Paul Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:33
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/324; H01F27/34; H01F27/36; H01F27/363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US14891A
Cited
US1523891A
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US1368811A
Cited
US1945917A
Cited
US2153090A
Cited
US2328443A
Cited
US2381782A
Cited
US2442274A
Cited
US2686904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |