US3220946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiated clay composition for use in drilling fluids
Assignee: Magnet Cove Barium Corp
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Filing: 1960-08-08
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Granted: 1965-11-30
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Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Turner Finis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/24; Y; Y10; Y10S; Y10S507/00; Y10S507/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
AN IMPROVED DRY CLAY MIXTURE FOR WELL FLUIDS WHICH CONSISTS ESSENTIALLY OF SODIUM BENTONITE IN INTIMATE ADMIXTURE WITH ABOUT 1/2 TO 5 POUNDS PER TON OF A POLYMERIZED WATER-SOLUBLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND BUTYLENE MALEIC ANHYDRIDE COPOLYMERS HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.1, ISOBUTYLENE MALEIC ANHYDRIDE COPOLYMERS HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.5, POLYACRYLIC ACIDS HAVING A MOLECULAR WEIGHT IN THE RANGE FROM 25,000 TO 150,000 AND ALKALI SALTS THEREOF; AND ABOUT 1 TO 30 POUNDS PER TON OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM SULFATE, POTASSIUM SULFATE, LITHIUM SULFATE, MAGNESIUM SULFATE, CALCIUM SULFATE, SODIUM FORMATE, CALCIUM ACETATE, SODIUM THIOCYANATE, A MIXTURE OF SALTS PREPARED BY REACTING SULFURIC ACID IN SITU WITH SODIUM BENTONITE, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
129 words
AN IMPROVED DRY CLAY MIXTURE FOR WELL FLUIDS WHICH CONSISTS ESSENTIALLY OF SODIUM BENTONITE IN INTIMATE ADMIXTURE WITH ABOUT 1/2 TO 5 POUNDS PER TON OF A POLYMERIZED WATER-SOLUBLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND BUTYLENE MALEIC ANHYDRIDE COPOLYMERS HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.1, ISOBUTYLENE MALEIC ANHYDRIDE COPOLYMERS HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.5, POLYACRYLIC ACIDS HAVING A MOLECULAR WEIGHT IN THE RANGE FROM 25,000 TO 150,000 AND ALKALI SALTS THEREOF; AND ABOUT 1 TO 30 POUNDS PER TON OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM SULFATE, POTASSIUM SULFATE, LITHIUM SULFATE, MAGNESIUM SULFATE, CALCIUM SULFATE, SODIUM FORMATE, CALCIUM ACETATE, SODIUM THIOCYANATE, A MIXTURE OF SALTS PREPARED BY REACTING SULFURIC ACID IN SITU WITH SODIUM BENTONITE, AND MIXTURES THEREOF.
References Cited (Backward Citations)
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US1528908A
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US1795011A
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US1867063A
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US2702788A
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US2948678A
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |