US3219580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids having enhanced lubricating properties
Assignee: Phillips Petroleum Co
•
Filing: 1962-04-26
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Granted: 1965-11-23
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Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Charles A Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:35
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/28; C09K8/14; C09K8/18; C09K8/22; C09K2208/00; C09K2208/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
AN AQUEOUS DRILLING FLUID HAVING ENHANCED LUBRICATING PROPERTIES COMPRISING WATER, FINELY DIVIDED INORGANIC SOLIDS, AND A SMALL BUT EFFECTIVE AMOUNT, SUFFICIENT TO PROVIDE SAID ENHANCED LUBRICATING PROPERTIES, OF A METAL SULFONATE CHARACTERIZED BY THE FOLLOWING FORMULA
Claim 2
Dependent Claim
36 words
AN AQUEOUS DRILLING FLUID HAVING ENHANCED LUBRICATING PROPERTIES COMPRISING WATER, FINELY DIVIDED INORGANIC SOLIDS, AND A SMALL BUT EFFECTIVE AMOUNT, SUFFICIENT TO PROVIDE SAID ENHANCED LUBRICATING PROPERTIES, OF A METAL SULFONATE CHARACTERIZED BY THE FOLLOWING FORMULA
References Cited (Backward Citations)
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US2228500A
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US2331049A
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US2568992A
Cited
US2502619A
Cited
US2713032A
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |