Patent US3025718A successfully refreshed from Google Patents.
Patent US2994660A successfully refreshed from Google Patents.
US2994660A
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Water-in-oil emulsion drilling fluid
Assignee: Magnet Cove Barium Corp
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Filing: 1957-05-27
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Granted: 1961-08-01
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 William A Reddie
- 👤 Robert N Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:20
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; C09K8/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A WELL FLUID COMPRISING A WATER-IN-OIL EMULSION STABILIZED WITH FROM 2.5 TO 30 POUNDS PER BARREL OF A POLYBASIC FATTY ACID POLYMER RESULTING FROM THE POLYMERIZATION OF UNSATURATED FATTY ACIDS HAVING FROM 12 TO 24 CARBON ATOMS PER MOLECULE, FROM 1 TO 10 POUNDS PER BARREL OF A WATER-SOLUBLE ALKALINE EARTH METAL SALT AND FROM 0.5 TO 5 POUNDS PER BARREL OF AN AMINO COMPOUND SELECTED FROM THE GROUP REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
73 words
A WELL FLUID COMPRISING A WATER-IN-OIL EMULSION STABILIZED WITH FROM 2.5 TO 30 POUNDS PER BARREL OF A POLYBASIC FATTY ACID POLYMER RESULTING FROM THE POLYMERIZATION OF UNSATURATED FATTY ACIDS HAVING FROM 12 TO 24 CARBON ATOMS PER MOLECULE, FROM 1 TO 10 POUNDS PER BARREL OF A WATER-SOLUBLE ALKALINE EARTH METAL SALT AND FROM 0.5 TO 5 POUNDS PER BARREL OF AN AMINO COMPOUND SELECTED FROM THE GROUP REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |