US2998638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making induction-motor squirrel cages
Assignee: RTX Corp
•
Filing: 1957-05-13
•
Granted: 1961-09-05
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Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Maclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:31
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/02; H02K15/021; H02K15/023; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012; Y10T29/4902; Y10T29/49075; Y10T29/49078; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711414A
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US2104141A
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US2138661A
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US2192434A
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US2411684A
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US2387073A
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US2528154A
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US2648123A
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US2834095A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |