Patent US3546572A successfully refreshed from Google Patents.
US3546572A
Expired / Lapsed
US
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Three-phase transformer power supply employing capacitors and clamping devices to suppress voltage surges
Assignee: Westinghouse Electric Corp
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Filing: 1968-12-10
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Granted: 1970-12-08
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Expires: 1988-12-10
Abstract
No abstract record available.
Inventors
- 👤 Theodore R Specht
- 👤 Gilbert D Throop
- 👤 Robert V Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:14
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/08; G05F3/10; G05F3/16; G05F3/18; H; H01; H01F; H01F27/00; H01F27/34; H01F27/343
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |