Patent US2491728A successfully refreshed from Google Patents.
US2491728A
Expired / Lapsed
US
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Bearing
Assignee: Individual
•
Filing: 1944-08-01
•
Granted: 1949-12-20
•
Expires: 1964-08-01
Abstract
No abstract record available.
Inventors
- 👤 Grafton Eugene Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/58; F16C33/60; F16C19/00; F16C19/02; F16C19/14; F16C19/18; F16C19/181; F16C19/183; F16C33/66; F16C33/6637; F16C33/664; F16C33/6651; F16C33/6681; F16C33/72; F16C33/76; F16C33/767; F16N; F16N9/00; F16N9/02; F16C19/10; F16C33/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US422723A
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US581710A
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US1312683A
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US772022A
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US827171A
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US1242153A
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US1563013A
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US1591395A
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US1685517A
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US2149974A
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US2179860A
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US2396623A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |