US2477423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous cascade dynamoelectric unit
Assignee: Individual
•
Filing: 1945-02-17
•
Granted: 1949-07-26
•
Expires: 1965-02-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Edmund O Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:23
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US587340A
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FR425262A
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US1331940A
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DE348341C
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US1591435A
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US1723906A
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US1628464A
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US1893346A
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US1848091A
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US1875763A
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US2061983A
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US2039322A
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GB471113A
Cited
US2444077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |