Patent US2556602A successfully refreshed from Google Patents.
US2556602A
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Electrical coil structure for transformers
Assignee: Individual
•
Filing: 1948-04-10
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Granted: 1951-06-12
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Expires: 1968-04-10
Abstract
No abstract record available.
Inventors
- 👤 Charles A Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:01
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2876; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US476816A
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US1790906A
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US874908A
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US940244A
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US1617489A
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DE465114C
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US1994534A
Cited
US2166139A
Cited
US2168154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |