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US3407347A
Expired / Lapsed
US
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Asymmetrical three-phase ferroresonance device
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1966-06-01
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Granted: 1968-10-22
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Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Hiroshi
- 👤 Hisano Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:44
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/12; H01F30/14; H01F38/00; H01F38/02; H03; H03B; H03B19/00; H03B19/03
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) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |