US2761384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cutting a pipe inside of a well
Assignee: Individual
•
Filing: 1951-02-26
•
Granted: 1956-09-04
•
Expires: 1971-02-26
Abstract
No abstract record available.
Inventors
- 👤 William G Sweetman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:49
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB125464A
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US2037906A
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US2362829A
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US2366373A
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US2415814A
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US2494256A
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US2684030A
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US2543057A
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US2587244A
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US2506836A
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US2638323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |