US2742260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well derrick
Assignee: Individual
•
Filing: 1953-07-17
•
Granted: 1956-04-17
•
Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 Patterson Luther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:26
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2314323A
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US2505087A
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US2474846A
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US2527255A
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US2595307A
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US2609180A
Cited
US2577642A
Cited
US2558119A
Cited
US2699965A
Cited
US2634831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |