US3177141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid
Assignee: Texaco Inc
•
Filing: 1962-06-21
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Granted: 1965-04-06
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Expires: 1982-06-21
Abstract
No abstract record available.
Inventors
- 👤 John S Brukner
- 👤 Clarence O Walker
- 👤 Walter J Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:09
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN AQUEOUS DRILLING FLUID COMPRISING AN AQUEOUS PHASE WHICH IS UNSATURATED WITH CALCIUM HDYROXIDE, SAID AQUEOUS PHASE HAVING A WATER SOLUBLE CALCIUM SALT DISSOLVED THEREIN TO YIELD A CALCIUM ION CONCENTRATION OF AT LEAST 200 PARTS PER MILLION BY WEIGHT AND A MINOR AMOUNT IN THE RANGE OF FROM ABOUT 0.1 TO ABOUT 10 OLBS. PER BARREL OF SAID DIRLLING FLUID OF A COMPATIBLE WATER SOLUBLE INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL, AMMONIUM AND ALKALINE EARTH METAL SALTS OF THE STANNATES, ARSENITES, PERIODATES, CHLORATES, VANADATES AND MIXTURES THEREOF.
Claim 2
Dependent Claim
92 words
AN AQUEOUS DRILLING FLUID COMPRISING AN AQUEOUS PHASE WHICH IS UNSATURATED WITH CALCIUM HDYROXIDE, SAID AQUEOUS PHASE HAVING A WATER SOLUBLE CALCIUM SALT DISSOLVED THEREIN TO YIELD A CALCIUM ION CONCENTRATION OF AT LEAST 200 PARTS PER MILLION BY WEIGHT AND A MINOR AMOUNT IN THE RANGE OF FROM ABOUT 0.1 TO ABOUT 10 OLBS. PER BARREL OF SAID DIRLLING FLUID OF A COMPATIBLE WATER SOLUBLE INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL, AMMONIUM AND ALKALINE EARTH METAL SALTS OF THE STANNATES, ARSENITES, PERIODATES, CHLORATES, VANADATES AND MIXTURES THEREOF.
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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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |