Patent US2694177A successfully refreshed from Google Patents.
US2694177A
Expired / Lapsed
US
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Transformer having constant and harmonic free output voltage
Assignee: Individual
•
Filing: 1951-03-16
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Granted: 1954-11-09
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Expires: 1971-03-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Sola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:24
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2143745A
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US2212198A
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GB549655A
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US2513512A
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GB554997A
Cited
US2419771A
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US2358725A
Cited
US2434493A
Cited
US2461957A
Cited
US2553591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |