US2547045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for cooling magnetic cores of electrical apparatus
Assignee: Ohio Crankshaft Co
•
Filing: 1947-12-04
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Granted: 1951-04-03
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Expires: 1967-12-04
Abstract
No abstract record available.
Inventors
- 👤 John T Sabol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:33
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245; H01F27/08; H01F27/10; H01F27/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US513420A
Cited
US1331896A
Cited
US1790906A
Cited
US834148A
Cited
GB166613A
Cited
US1819481A
Cited
US1789229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |