Patent US2603598A successfully refreshed from Google Patents.
US2603598A
Expired / Lapsed
US
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Controlling alkalinity of drilling fluids
Assignee: Standard Oil Development Co
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Filing: 1950-04-01
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Granted: 1952-07-15
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Expires: 1970-04-01
Abstract
No abstract record available.
Inventors
- 👤 Victor G Meadors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:15
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A DRILLING FLUID COMPRISING AN AQUEOUS SUSPENSION OF A CLAY TO WHICH HAS BEEN ADDED SUFFICIENT ALKANOLAMINE TO RAISE THE PH OF THE COMPOSITION TO AT LEAST 10, SAID ALKANOLAMINE BEING CHARACTERIZED BY HAVING A TOTAL OF NOT MORE THAN 15 CARBON ATOMS AND NOT MORE THAN 3 CARBON ATOMS BETWEEN THE HYDROXYL GROUP AND THE AMINO GROUP IN THE ALKANOL RADICAL.
Claim 2
Dependent Claim
62 words
A DRILLING FLUID COMPRISING AN AQUEOUS SUSPENSION OF A CLAY TO WHICH HAS BEEN ADDED SUFFICIENT ALKANOLAMINE TO RAISE THE PH OF THE COMPOSITION TO AT LEAST 10, SAID ALKANOLAMINE BEING CHARACTERIZED BY HAVING A TOTAL OF NOT MORE THAN 15 CARBON ATOMS AND NOT MORE THAN 3 CARBON ATOMS BETWEEN THE HYDROXYL GROUP AND THE AMINO GROUP IN THE ALKANOL RADICAL.
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) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |