US3057797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low cost emusion drilling fluid
Assignee: Pan American Petroleum Corp
•
Filing: 1960-01-04
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Granted: 1962-10-09
•
Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 Duane B Anderson
- 👤 James L Lummus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:08
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; C09K8/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A STABLE WATER-IN-OIL EMULSION DRILLING FLUID COMPRISFROM ABOUT 40 TO ABOUT 70 PARTS BY VOLUME OF WATER AND FROM ABOUT 30 TO ABOUT 60 PARTS BY VOLUME OF OIL, SAID EMULSION DRILLING FLUID CONTAINING AT LEAST ABOUT 1.5 POUNDS PER BARREL OF COMMERCIAL LECITHIN, AT LEAST ABOUT 0.25 POUND PER BARREL OF AN EMULSION STABILIZING AGENT SELECTED FROM THE GROUP OF OIL-SOLUBLE SURFACE ACTIVE AGENTS CONSISTING OF THOSE HAVING THE FORMULAS:
Claim 2
Dependent Claim
71 words
A STABLE WATER-IN-OIL EMULSION DRILLING FLUID COMPRISFROM ABOUT 40 TO ABOUT 70 PARTS BY VOLUME OF WATER AND FROM ABOUT 30 TO ABOUT 60 PARTS BY VOLUME OF OIL, SAID EMULSION DRILLING FLUID CONTAINING AT LEAST ABOUT 1.5 POUNDS PER BARREL OF COMMERCIAL LECITHIN, AT LEAST ABOUT 0.25 POUND PER BARREL OF AN EMULSION STABILIZING AGENT SELECTED FROM THE GROUP OF OIL-SOLUBLE SURFACE ACTIVE AGENTS CONSISTING OF THOSE HAVING THE FORMULAS:
References Cited (Backward Citations)
US2316968A
Cited
US2773670A
Cited
US2885358A
Cited
DE1037388B
Cited
US2999063A
Cited
US2891082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |