US2921519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well shooting
Assignee: Individual
•
Filing: 1952-05-15
•
Granted: 1960-01-19
•
Expires: 1972-05-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US87372A
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US156673A
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US203034A
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USRE21356E
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US2163462A
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US2251712A
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US2362829A
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US2363234A
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US2455556A
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US2558924A
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US2671400A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |