US2686472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torpedo shell for shooting wells
Assignee: Individual
•
Filing: 1948-12-30
•
Granted: 1954-08-17
•
Expires: 1968-12-30
Abstract
No abstract record available.
Inventors
- 👤 Howard B Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
F; F42; F42D; F42D1/00; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263; F42B; F42B3/00; F42B3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US204590A
Cited
US482060A
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US1367938A
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US2031505A
Cited
US2067408A
Cited
GB562984A
Cited
US2409848A
Cited
US2494256A
Cited
US2588957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |