US2594002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase core
Assignee: Westinghouse Electric Corp
•
Filing: 1949-07-09
•
Granted: 1952-04-22
•
Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 Belvin B Ellis
- 👤 Clifford C Horstman
- 👤 Charles E Burkhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:09
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245; H01F27/2455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US400862A
Cited
US523572A
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US2300964A
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US2367927A
Cited
US2477350A
Cited
US2456461A
Cited
US2516164A
Cited
US2489625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |