Patent US2641816A successfully refreshed from Google Patents.
US2641816A
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Power operated slip
Assignee: Mission Manufacturing Co
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Filing: 1946-10-21
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Granted: 1953-06-16
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Expires: 1966-10-21
Abstract
No abstract record available.
Inventors
- 👤 Walter E Liljestrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:55
CPC Classifications
D; D06; D06M; D06M16/00; E; E21; E21B; E21B19/00; E21B19/10
Claims Analysis
Total Claims: 0
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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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |