Patent US2773031A successfully refreshed from Google Patents.
US2773031A
Expired / Lapsed
US
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Drilling muds
Assignee: Gulf Oil Corp
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Filing: 1954-10-28
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Granted: 1956-12-04
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Expires: 1974-10-28
Abstract
No abstract record available.
Inventors
- 👤 Rodolfo J Tailleur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A DRILLING MUD OF ENHANCED LUBRICATING PROPERTIES COMPRISING AN OIL-IN-WATER EMULSION CONTAINING CLAY SOLIDS, AN ASPHALT IN THE OIL PHASE, SAID ASPHALT HAVING CHEMICALLY COMBINED SULFUR AND BEING PRESENT IN AN AMOUNT SUFFICIENT TO PROVIDE AT LEAST ABOUT ONE PERCENT OF SULFUR BY WEIGHT OF THE OIL PHASE, SAID MUD CONTAINING NO AMOUNT OF ALKALI METAL HYDROXIDE SUFFICIENT TO DESTROY THE ENHANCED LUBRICATING PROPERTIES OF THE MUD.
Claim 2
Dependent Claim
67 words
A DRILLING MUD OF ENHANCED LUBRICATING PROPERTIES COMPRISING AN OIL-IN-WATER EMULSION CONTAINING CLAY SOLIDS, AN ASPHALT IN THE OIL PHASE, SAID ASPHALT HAVING CHEMICALLY COMBINED SULFUR AND BEING PRESENT IN AN AMOUNT SUFFICIENT TO PROVIDE AT LEAST ABOUT ONE PERCENT OF SULFUR BY WEIGHT OF THE OIL PHASE, SAID MUD CONTAINING NO AMOUNT OF ALKALI METAL HYDROXIDE SUFFICIENT TO DESTROY THE ENHANCED LUBRICATING PROPERTIES OF THE MUD.
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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |