US3740360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing composition and method
Assignee: Schlumberger Technology Corp
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Filing: 1970-11-12
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Granted: 1973-06-19
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Expires: 1990-11-12
Abstract
Abstract A COMPOSITION IS PROVIDED WHICH MAY BE EMPLOYED FOR THE SELECTIVE SEALING OF PERMEABLE FORMATIONS. THE COMPOSITION CONTAINS AT LEAST ONE PARTICULATE GALACTOMANNAN GUM WHICH IS TREATED WITH A HYDROPHOBING AGENT TO RENDER THE GUM HYDROPHOBIC IN AQUEOUS SOLUTIONS HAVING A PH OF AT LEAST ABOUT 7.5, A PH CONTROL AGENT AND A WATERSOLUBLE ORGANIC POLYMERIC SUSPENDING AGENT. OPTIONALLY, A DEGRADATION AGENT, A CROSS-LINKING AGENT AND/OR A HYDRATION AGENT CAN BE INCLUDED.
Inventors
- 👤 K Nimerick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/887; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/512; C09K8/514; C09K8/90
Claims Analysis
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |