US2497516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical winding
Assignee: Metropolitan Engineering Co
•
Filing: 1944-04-22
•
Granted: 1950-02-14
•
Expires: 1964-04-22
Abstract
No abstract record available.
Inventors
- 👤 George H Phelps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:06
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US617067A
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US665573A
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US1105385A
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US1242649A
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US1394044A
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US1471096A
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US1449206A
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US1588512A
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US2170700A
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US2255657A
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US2325810A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |