Patent US2623015A successfully refreshed from Google Patents.
US2623015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil base drilling fluids
Assignee: Union Oil Company of California
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Filing: 1950-10-16
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Granted: 1952-12-23
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Expires: 1970-10-16
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:02
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
69 words
AN OIL-BASE DRILLING FLUID ESSENTIALLY COMPRISING A MINERAL OIL BASE 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 0.2 AND ABOUT 5 PER CENT BY WEIGHT OF A DRYING OIL.
Claim 2
Dependent Claim
69 words
AN OIL-BASE DRILLING FLUID ESSENTIALLY COMPRISING A MINERAL OIL BASE 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 0.2 AND ABOUT 5 PER CENT BY WEIGHT OF A DRYING OIL.
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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |