Patent US2695189A successfully refreshed from Google Patents.
US2695189A
Expired / Lapsed
US
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Well pipe elevator
Assignee: Byron Jackson Co
•
Filing: 1950-06-10
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Granted: 1954-11-23
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Expires: 1970-06-10
Abstract
No abstract record available.
Inventors
- 👤 John L Chrisman
- 👤 Garth F Nicolson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:38
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; E21B19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1346160A
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US1549199A
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US1581270A
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US1571332A
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US1804758A
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US2105077A
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US2370528A
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US2392462A
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US2636769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |