US2919646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well explosive devices
Assignee: Individual
•
Filing: 1953-05-26
•
Granted: 1960-01-05
•
Expires: 1973-05-26
Abstract
No abstract record available.
Inventors
- 👤 Foster James Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:54
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1246363A
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US1711797A
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US2061835A
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US2048451A
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US1951638A
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US2003345A
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US2169671A
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US2080978A
Cited
US2307729A
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US2408419A
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US2419414A
Cited
US2426517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |