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US2644679A
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US
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Assignee: Joy Manufacturing Co
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Filing: 1948-02-05
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Granted: 1953-07-07
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Expires: 1968-02-05
Abstract
No abstract record available.
Inventors
- 👤 Leon E Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:26
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/193; E21C35/1936
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1078082A
Cited
US1566304A
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US1926047A
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US2244198A
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US2107942A
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US2190674A
Cited
US2312538A
Cited
US2389936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |