US2790388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for stimulating the flow of well fluids and for declogging well bore walls and well casing perforations
Assignee: Individual
•
Filing: 1949-04-21
•
Granted: 1957-04-30
•
Expires: 1969-04-21
Abstract
No abstract record available.
Inventors
- 👤 Norman A Macleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:43
CPC Classifications
E; E21; E21B; E21B37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US224024A
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US2062974A
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US2043340A
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US2177886A
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US2362829A
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US2414349A
Cited
US2331058A
Cited
US2402153A
Cited
US2450366A
Cited
US2599245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |