Patent US2671196A successfully refreshed from Google Patents.
US2671196A
Expired / Lapsed
US
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Welding transformer
Assignee: Individual
•
Filing: 1948-06-24
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Granted: 1954-03-02
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Expires: 1968-06-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:48
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305361A
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US851743A
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US1665869A
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US1876427A
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US2027593A
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US2136863A
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US2091366A
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US2364881A
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US2441814A
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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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |