Patent US3340188A successfully refreshed from Google Patents.
US3340188A
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Drilling fluid
Assignee: Phillips Petroleum Co
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Filing: 1965-10-23
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Granted: 1967-09-05
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert M Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:06
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/203; C09K2208/00; C09K2208/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A DRILLING FLUID COMPRISING A FLUID MEDIUM HAVING A CONTINUOUS AQUEOUS PHASE AND AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL SULFONATE OF TALL OIL PITCH, AN ALKALINE EARTH METAL SULFONATE OF TALL OIL PITCH, AND THE AMMONIUM SULFONATE OF TALL OIL PITCH, SAID ADDITIVE BEING PRESENT IN AN AMOUNT SUFFICIENT TO REDUCE THE FULTRATION RATE AND THE COEFFICIENT OF FRICTION OF SAID DRILLING FLUID.
Claim 2
Dependent Claim
68 words
A DRILLING FLUID COMPRISING A FLUID MEDIUM HAVING A CONTINUOUS AQUEOUS PHASE AND AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL SULFONATE OF TALL OIL PITCH, AN ALKALINE EARTH METAL SULFONATE OF TALL OIL PITCH, AND THE AMMONIUM SULFONATE OF TALL OIL PITCH, SAID ADDITIVE BEING PRESENT IN AN AMOUNT SUFFICIENT TO REDUCE THE FULTRATION RATE AND THE COEFFICIENT OF FRICTION OF SAID DRILLING FLUID.
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |