US2542019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids
Assignee: Union Oil Company of California
•
Filing: 1948-07-22
•
Granted: 1951-02-20
•
Expires: 1968-07-22
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:45
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A DRILLING FLUID COMPOSITION FOR DRILLING OIL AND GAS WELLS PREPARED BY DISPERSING BETWEEN ABOUT 0.1 AND ABOUT 10 PARTS BY WEIGHT OF A WATER-DISPERSIBLE ALKALI-METAL SOAP, BETWEEN ABOUT 1.0 AND ABOUT 1.5 PARTS BY WEIGHT OF AN ALKALINE-EARTH METAL BASE, BETWEEN ABOUT 0.05 AND ABOUT 5 PARTS BY WEIGHT OF A HYDRATABLE CLAY AND BETWEEN ABOUT 0.05 AND ABOUT 10 PARTS BY WEIGHT OF WATER IN SUFFICIENT MINERAL OIL TO MAKE 100 PARTS BY WEIGHT.
References Cited (Backward Citations)
US2099825A
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US2216955A
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US2214634A
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US2297660A
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US2380156A
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US2360992A
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US2350154A
Cited
US2423144A
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US2430039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |