Patent US3185642A successfully refreshed from Google Patents.
US3185642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid and mud thickening agent therefor
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1961-06-12
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Granted: 1965-05-25
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Expires: 1981-06-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Edgar W Sawyer
- 👤 Jr Walter L Haden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:25
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN ADMIXTURE ADAPTED FOR USE AS A THICKENING AGENT FOR FRESH WATER AND SALT CONTAMINATED AQUEOUS DRILLING MUDS COMPRISING COLLOIDAL ATTAPULGITE CLAY AND A MAGNESIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDRATABLE MGO AND MG (OH)2 IN AN AMOUNT WITHIN THE RANGE OF FROM ABOUT 1/4% TO 4% BASED ON THE WEIGHT OF SAID ATTAPULGITE CLAY, SAID AMOUNT OF MAGNESIUM COMPOUND BEING SUCH THAT SAID ADMIXTURE HAS AN API SATURATED SALTWATER MUS YEILD SUBSTANTIALLY HIGHER THAN THE API SATURATED SALT-WATER YIELD OF SAID CLAY IN THE ABSENCE OF SAID MAGNESIUM COMPOUND, SAID ADMIXTURE BEING FURTHER CHARACTERIZED BY THE FACT THAT THE CLAY THEREIN HAS NEVER BEEN HEATED TO A TEMPERATURE GREATER THAN ABOUT 300*F.
Claim 2
Dependent Claim
115 words
AN ADMIXTURE ADAPTED FOR USE AS A THICKENING AGENT FOR FRESH WATER AND SALT CONTAMINATED AQUEOUS DRILLING MUDS COMPRISING COLLOIDAL ATTAPULGITE CLAY AND A MAGNESIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDRATABLE MGO AND MG (OH)2 IN AN AMOUNT WITHIN THE RANGE OF FROM ABOUT 1/4% TO 4% BASED ON THE WEIGHT OF SAID ATTAPULGITE CLAY, SAID AMOUNT OF MAGNESIUM COMPOUND BEING SUCH THAT SAID ADMIXTURE HAS AN API SATURATED SALTWATER MUS YEILD SUBSTANTIALLY HIGHER THAN THE API SATURATED SALT-WATER YIELD OF SAID CLAY IN THE ABSENCE OF SAID MAGNESIUM COMPOUND, SAID ADMIXTURE BEING FURTHER CHARACTERIZED BY THE FACT THAT THE CLAY THEREIN HAS NEVER BEEN HEATED TO A TEMPERATURE GREATER THAN ABOUT 300*F.
References Cited (Backward Citations)
US1795011A
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US1867063A
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US2044758A
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US2665259A
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US2828258A
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US2856356A
Cited
US3079333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |