US2771419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous starch-containing drilling muds having a reduced filtration rate
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-08-15
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Granted: 1956-11-20
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Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Richard A Salathiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:48
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A DRILLING MUD COMPRISING AT LEAST 5% BY WEIGHT OF FINELY DIVIDED SOLIDS AND WATER HAVING ABOUT 2 TO 15 PERCENT BY WEIGHT OF SALT DISSOLVED THEREIN TO WHICH HAS BEEN ADDED AMOUNTS OF STARCH AND GLYOXAL SUFFICIENT TO SUBSTANTIALLY REDUCE THE WATER FILTRATION LOSS RATE OF SAID DRILLING MUD, SAID DRILLING MUD CONTAINING FROM ABOUT 0.5 TO 5 POUNDS OF GLYOXAL AND ABOUT 1 TO 15 POUNDS OF STARCH PER 42-GALLON BARREL OF DRILLING MUD.
Claim 2
Dependent Claim
76 words
A DRILLING MUD COMPRISING AT LEAST 5% BY WEIGHT OF FINELY DIVIDED SOLIDS AND WATER HAVING ABOUT 2 TO 15 PERCENT BY WEIGHT OF SALT DISSOLVED THEREIN TO WHICH HAS BEEN ADDED AMOUNTS OF STARCH AND GLYOXAL SUFFICIENT TO SUBSTANTIALLY REDUCE THE WATER FILTRATION LOSS RATE OF SAID DRILLING MUD, SAID DRILLING MUD CONTAINING FROM ABOUT 0.5 TO 5 POUNDS OF GLYOXAL AND ABOUT 1 TO 15 POUNDS OF STARCH PER 42-GALLON BARREL OF DRILLING MUD.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |