US2436036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for severing well casings and the like in place in the well
Assignee: Individual
•
Filing: 1944-09-14
•
Granted: 1948-02-17
•
Expires: 1964-09-14
Abstract
No abstract record available.
Inventors
- 👤 Loyd F Defenbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:56
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1258834A
Cited
US1582184A
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US2024132A
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US2144208A
Cited
US2058287A
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US2315496A
Cited
US2225028A
Cited
US2263412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |