Patent US4176949A successfully refreshed from Google Patents.
Patent US3487877A successfully refreshed from Google Patents.
US3487877A
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Controlling consolidation of permeable earth formations
Assignee: Hughes Tool Co
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Filing: 1967-12-27
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Granted: 1970-01-06
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Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Norbert E Methven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:47
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/516; E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123138A
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US2316367A
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US2475713A
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US2773670A
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US3047067A
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US3294166A
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US3347314A
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US3336980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |