US2617767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil base drilling fluids
Assignee: Union Oil Company of California
•
Filing: 1950-10-21
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Granted: 1952-11-11
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Expires: 1970-10-21
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:30
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN OIL-BASE DRILLING FLUID ESSENTIALLY COMPRISING A MINERAL OIL HAVING DISPERSED THEREIN BETWEEN ABOUT 1 AND ABOUT 10 PER CENT BY WEIGHT OF AN OIL-DISPERSIBLE METAL SOAP, BETWEEN ABOUT 0.1 AND ABOUT 5 PER CENT BY WEIGHT OF A HYDRATABLE CLAY, BETWEEN ABOUT 0.2 AND ABOUT 10 PER CENT BY WEIGHT OF WATER, AND BETWEEN ABOUT 2 AND ABOUT 20 PER CENT BY WEIGHT OF FINELY-DIVIDED SUBSTANTIALLY PETROLEUM HYDROCARBON INSOLUBLE PINE WOOD RESIN.
Claim 2
Dependent Claim
73 words
AN OIL-BASE DRILLING FLUID ESSENTIALLY COMPRISING A MINERAL OIL HAVING DISPERSED THEREIN BETWEEN ABOUT 1 AND ABOUT 10 PER CENT BY WEIGHT OF AN OIL-DISPERSIBLE METAL SOAP, BETWEEN ABOUT 0.1 AND ABOUT 5 PER CENT BY WEIGHT OF A HYDRATABLE CLAY, BETWEEN ABOUT 0.2 AND ABOUT 10 PER CENT BY WEIGHT OF WATER, AND BETWEEN ABOUT 2 AND ABOUT 20 PER CENT BY WEIGHT OF FINELY-DIVIDED SUBSTANTIALLY PETROLEUM HYDROCARBON INSOLUBLE PINE WOOD RESIN.
References Cited (Backward Citations)
US2542020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |