US2431950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core construction for electromagnetic apparatus
Assignee: Jefferson Electric Co
•
Filing: 1944-01-26
•
Granted: 1947-12-02
•
Expires: 1964-01-26
Abstract
No abstract record available.
Inventors
- 👤 Mauerer Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:38
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/33; H01F27/24; H01F27/26; H01F27/263; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412; Y10T24/1433; Y10T24/1435; Y10T24/1437
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR753881A
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US461135A
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GB190220647A
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US1145551A
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US1382873A
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US1686513A
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DE427792C
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US1731894A
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US2029983A
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GB440008A
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US2289175A
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US2331369A
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US2318095A
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US2336665A
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US2367927A
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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) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |