US2636241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power-operated slip
Assignee: Mission Manufacturing Co
•
Filing: 1947-04-09
•
Granted: 1953-04-28
•
Expires: 1967-04-09
Abstract
No abstract record available.
Inventors
- 👤 Walter E Liljestrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:59
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2153474A
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US1341702A
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US1656864A
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US1878372A
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US1834597A
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US2034101A
Cited
US2033227A
Cited
US1986284A
Cited
US2076042A
Cited
US2063378A
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US2231923A
Cited
US2340597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |