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US3524092A
Expired / Lapsed
US
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Synchronous motor
Assignee: Hitachi Ltd
•
Filing: 1967-07-20
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Granted: 1970-08-11
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Expires: 1987-07-20
Abstract
No abstract record available.
Inventors
- 👤 Takeshi Miyazaki
- 👤 Shinsaku Kajita
- 👤 Tatsunosuke Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:18
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/10; H02K19/103; H02K19/04; H02K19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124733A
Cited
US2295082A
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US2578407A
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US2803765A
Cited
US2912609A
Cited
DE1118335B
Cited
DE1092113B
Cited
US3038092A
Cited
US3068373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |