US2725539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformers
Assignee: Elastic Stop Nut Corp
•
Filing: 1954-05-21
•
Granted: 1955-11-29
•
Expires: 1974-05-21
Abstract
No abstract record available.
Inventors
- 👤 Leslie M Merrill
- 👤 Gustav V Karlson
- 👤 Martha P Oestnaes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:28
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/022; H01F41/00; H01F41/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2210487A
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US2185831A
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US2339054A
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US2339067A
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US2413897A
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US2384287A
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US2391038A
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US2385460A
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US2382200A
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US2425831A
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US2459943A
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US2534119A
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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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |