Patent JPS5947263A successfully refreshed from Google Patents.
US3500932A
Expired / Lapsed
US
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Use of micellar solution to precede sandfrac treatments
Assignee: Marathon Oil Co
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Filing: 1968-09-24
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Granted: 1970-03-17
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Expires: 1988-09-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas O Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:19
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2859819A
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US2802531A
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US2946747A
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US2927639A
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US2869643A
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US3275075A
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US3254714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |