Patent US1722489A successfully refreshed from Google Patents.
US1722489A
Expired / Lapsed
US
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Means for retaining lubricant and excluding dust
Assignee: NORMA HOFFMANN BEARINGS CORP
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Filing: 1926-05-18
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Granted: 1929-07-30
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Expires: 1946-05-18
Abstract
No abstract record available.
Inventors
- 👤 George R Bott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:16
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C33/78; F16C33/7886; F16C33/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-07-29 | 1933-01-28 | 1933-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-29 | 1937-01-28 | 1937-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-29 | 1941-01-28 | 1941-07-30 | $7700.00 | Window Closed / Lapsed |