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US2497023A
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Method for finishing electric rotors
Assignee: Nachi Machining Technology Co
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Filing: 1946-10-14
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Granted: 1950-02-07
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Expires: 1966-10-14
Abstract
No abstract record available.
Inventors
- 👤 Sr Donald D Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:10
CPC Classifications
B; B23; B23C; B23C3/00; B23C3/02; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303752; Y10T409/303808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2200544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |