US3019731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet perforator for well casings
Assignee: ADVANCED OIL TOOLS Inc
•
Filing: 1960-02-19
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Granted: 1962-02-06
•
Expires: 1980-02-19
Abstract
No abstract record available.
Inventors
- 👤 Edwards Edwin David
- 👤 Ralph J Hach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:36
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; F; F42; F42B; F42B1/00; F42B1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2399211A
Cited
US2407093A
Cited
US2708408A
Cited
US2667836A
Cited
FR1023832A
Cited
US2629325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |