Patent US2750239A successfully refreshed from Google Patents.
US2750239A
Expired / Lapsed
US
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Bearing unit for spindles of spinning frames and twisting frames
Assignee: SKF GmbH
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Filing: 1952-02-09
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Granted: 1956-06-12
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Expires: 1972-02-09
Abstract
No abstract record available.
Inventors
- 👤 Rogner Ernst
- 👤 Steichele Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:47
CPC Classifications
F; F16; F16C; F16C27/00; F16C27/08; D; D01; D01H; D01H7/00; D01H7/02; D01H7/04; D01H7/045; F16C2340/00; F16C2340/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US875503A
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FR604869A
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CH203923A
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US2283963A
Cited
US2631070A
Cited
US2514157A
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US2529904A
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US2486296A
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US2583080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |