Patent US2420820A successfully refreshed from Google Patents.
US2420820A
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Roller bearing
Assignee: Timken Co
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Filing: 1945-05-03
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Granted: 1947-05-20
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Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Clifford L Eastburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/22; F16C19/34; F16C19/36; F16C19/364; B; B61; B61C; B61C17/00; B61C17/10; F16C19/54; F16C33/00; F16C33/30; F16C33/58; F16C33/60; F16C33/605; F16C2326/00; F16C2326/01; F16C2326/02; F16C2326/10; F16C33/34; F16C33/36; F16C33/366; F16C5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US986453A
Cited
US1992682A
Cited
US2024206A
Cited
FR812175A
Cited
US2071797A
Cited
US2198376A
Cited
US2180315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |