Patent US2729520A successfully refreshed from Google Patents.
US2729520A
Expired / Lapsed
US
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Roller bearing assembly
Assignee: SMITH BEARING Co Inc
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Filing: 1953-01-09
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Granted: 1956-01-03
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Expires: 1973-01-09
Abstract
No abstract record available.
Inventors
- 👤 Frank W Ritchie
- 👤 Leonhard A Maas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:07
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/46; F16C33/48; F16C19/00; F16C19/22; F16C19/44; F16C19/46; F16C19/466; F16C19/48; F16C33/4694; F16C33/54; F16C33/542; F16C33/543; F16C33/545
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |