Patent US1718293A successfully refreshed from Google Patents.
US1718293A
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US
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Bearing air protection
Assignee: Hoover Co
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Filing: 1923-10-06
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Granted: 1929-06-25
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Expires: 1943-10-06
Abstract
No abstract record available.
Inventors
- 👤 Hoover Howard Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:35
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/74; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/406
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) | 1932-06-24 | 1932-12-24 | 1933-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-06-24 | 1936-12-24 | 1937-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-06-24 | 1940-12-24 | 1941-06-25 | $7700.00 | Window Closed / Lapsed |