Patent US2644307A successfully refreshed from Google Patents.
US2644307A
Expired / Lapsed
US
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Pneumatic hoist
Assignee: Individual
•
Filing: 1950-01-10
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Granted: 1953-07-07
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Expires: 1970-01-10
Abstract
No abstract record available.
Inventors
- 👤 Blair Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:21
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1476703A
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US1460586A
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US1619474A
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US1596145A
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US1816829A
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GB485617A
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US2286620A
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US2578959A
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 |