Patent US2923356A successfully refreshed from Google Patents.
US2923356A
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US
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Plugging water and gas zones of wells
Assignee: Pan American Petroleum Corp
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Filing: 1957-07-01
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Granted: 1960-02-02
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene D Glass
- 👤 Sylvain J Pirson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:49
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |