Patent US2807844A successfully refreshed from Google Patents.
US2807844A
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Apparatus for making dynamoelectric machine cast winding rotor
Assignee: General Electric Co
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Filing: 1953-05-28
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Granted: 1957-10-01
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Expires: 1973-05-28
Abstract
No abstract record available.
Inventors
- 👤 Lawrence F Hemphill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:53
CPC Classifications
B; B22; B22D; B22D17/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1360484A
Cited
US2065213A
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US1935747A
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GB489999A
Cited
US2239989A
Cited
US2321731A
Cited
US2466432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |