US2464669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cleaning perforations in well liners
Assignee: B & B Oil Tool Co
•
Filing: 1946-10-07
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Granted: 1949-03-15
•
Expires: 1966-10-07
Abstract
No abstract record available.
Inventors
- 👤 Howard C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:18
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US206242A
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US1380517A
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US1488662A
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US1809546A
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US2059459A
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US2151416A
Cited
US2224412A
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US2221137A
Cited
US2212784A
Cited
US2437456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |