Patent US2850311A successfully refreshed from Google Patents.
US2850311A
Expired / Lapsed
US
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Grease and oil seal
Assignee: TEK BEARING CO
•
Filing: 1954-05-18
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Granted: 1958-09-02
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Expires: 1974-05-18
Abstract
No abstract record available.
Inventors
- 👤 Roland M Mansfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:21
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C33/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US398756A
Cited
US2704650A
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US1176834A
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US1294620A
Cited
US1798268A
Cited
GB482873A
Cited
DE852632C
Cited
US2585556A
Cited
US2750214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |