Patent US2500978A successfully refreshed from Google Patents.
US2500978A
Expired / Lapsed
US
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Electric motor bearing
Assignee: John Oster Manufacturing Co
•
Filing: 1943-09-13
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Granted: 1950-03-21
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Expires: 1963-09-13
Abstract
No abstract record available.
Inventors
- 👤 Bylund Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:39
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1672
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1336196A
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US1618877A
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GB336214A
Cited
US2007021A
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US2181418A
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US2177472A
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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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |