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Patent US2946746A successfully refreshed from Google Patents.
US2946746A
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Oil-external emulsion drilling fluids
Assignee: Union Oil Company of California
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Filing: 1956-10-01
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Granted: 1960-07-26
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard F Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:45
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; C09K8/36; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07; Y10S516/905; Y10S516/914; Y10S516/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A DRILLING FLUID COMPOSITION COMPRISING (1) AN EMULSIFIED LIQUID SUSPENDING MEDIUM COMPRISING BETWEEN ABOUT 20 AND ABOUT 90 PERCENT BY VOLUME OF A HYDROCARBON OIL AS THE CONTINUOUS PHASE, BETWEEN ABOUT 80 AND ABOUT 10 PERCENT BY VOLUME OF WATER AS THE DISPERSED PHASE, AND SUFFICIENT OF A POLYAMIDE COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
54 words
A DRILLING FLUID COMPOSITION COMPRISING (1) AN EMULSIFIED LIQUID SUSPENDING MEDIUM COMPRISING BETWEEN ABOUT 20 AND ABOUT 90 PERCENT BY VOLUME OF A HYDROCARBON OIL AS THE CONTINUOUS PHASE, BETWEEN ABOUT 80 AND ABOUT 10 PERCENT BY VOLUME OF WATER AS THE DISPERSED PHASE, AND SUFFICIENT OF A POLYAMIDE COMPOUND OF THE GENERAL FORMULA:
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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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |