Patent US2892249A successfully refreshed from Google Patents.
US2892249A
Expired / Lapsed
US
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Method of manufacturing a transformer core construction
Assignee: Advance Transformer Co
•
Filing: 1956-01-10
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Granted: 1959-06-30
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Expires: 1976-01-10
Abstract
No abstract record available.
Inventors
- 👤 Albert E Feinberg
- 👤 Frank S Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F38/10; H01F41/00; H01F41/02; H01F41/0206; H01F41/0233; Y; Y10; Y10S; Y10S315/00; Y10S315/05; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49078; Y10T83/00; Y10T83/04; Y10T83/0524; Y10T83/0529
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US509770A
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US1314051A
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US1472023A
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US1962431A
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US2085092A
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US2330824A
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US2575093A
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US2582291A
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US2708741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |