US2856356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a drilling fluid composition and method of use
Assignee: Texaco Inc
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Filing: 1956-07-25
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Granted: 1958-10-14
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Walter J Weiss
- 👤 Wilbur L Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:40
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A DRILLING FLUID COMPRISING AN ALKALINE AQUEOUS PHASE WHICH CONSISTS ESSENTIALLY OF A SATURATED AQUEOUS MAGNESIUM HYDROXIDE SOLUTION AT LEAST ABOUT 400 PARTS PER MILLION BY WEIGHT MAGNESIUM DISSOLVED THEREIN, AND A WATER-SOLUBLE AMMONIUM COMPOUND AS A SOLUBILIZING AGENT FOR SAID MAGNESIUM HYDROXIDE, SAID AQUEOUS PHASE HAVING A PH IN THE RANGE 8.5-10.5.
Claim 2
Dependent Claim
53 words
A DRILLING FLUID COMPRISING AN ALKALINE AQUEOUS PHASE WHICH CONSISTS ESSENTIALLY OF A SATURATED AQUEOUS MAGNESIUM HYDROXIDE SOLUTION AT LEAST ABOUT 400 PARTS PER MILLION BY WEIGHT MAGNESIUM DISSOLVED THEREIN, AND A WATER-SOLUBLE AMMONIUM COMPOUND AS A SOLUBILIZING AGENT FOR SAID MAGNESIUM HYDROXIDE, SAID AQUEOUS PHASE HAVING A PH IN THE RANGE 8.5-10.5.
References Cited (Backward Citations)
US2371955A
Cited
US2491437A
Cited
US2686593A
Cited
US2607730A
Cited
US2771420A
Cited
US2789949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |