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Patent US3107727A successfully refreshed from Google Patents.
US3107727A
Expired / Lapsed
US
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Restraining flow of sand into wells
Assignee: Pan American Petroleum Corp
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Filing: 1961-10-12
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Granted: 1963-10-22
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 George C Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:12
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
A STRONG RIGID SAND-RESTRAINING LINER OPPOSITE A FLUIDPRODUCING FORMATION PENETRATED BY A WELL COMPRISING A FABRIC PRESSED AGAINST THE WELL WALL AT THE LEVEL OF SAID
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |