Patent US2964109A successfully refreshed from Google Patents.
US2964109A
Expired / Lapsed
US
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Method of eliminating water resistant coating from bore of injection wells
Assignee: Oil Recovery Corp
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Filing: 1958-05-01
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Granted: 1960-12-13
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Expires: 1978-05-01
Abstract
No abstract record available.
Inventors
- 👤 James W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:20
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US656466A
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US1511067A
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US2623595A
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US2875831A
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US2768694A
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US2875832A
Cited
US2875833A
Cited
US2811209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |