US3034982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling fluid
Assignee: Magnet Cove Barium Corp
•
Filing: 1957-05-10
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Granted: 1962-05-15
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Expires: 1977-05-10
Abstract
No abstract record available.
Inventors
- 👤 Kenneth P Monroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:35
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
155 words
A WELL DRILLING FLUID COMPRISING AN AQUEOUS DISPERSION OF CLAY CONTAINING A YIELD POINT REDUCING AMOUNT OF A WATER SOLUBLE LIGNITE DERIVATIVE MADE BY HEATING 100 PARTS OF LIGNITE IN AN ALKALINE LIQUID REACTION MEDIUM WITH 6 TO 50 PARTS OF A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUROUS ACID AND WATER SOLUBLE SALTS THEREOF, A METHYLENIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND METHYL KETONES, SAID METHYLENIC COMPOUND BEING PRESENT IN AMOUNT STOICHIOMETRICALLY EQUIVALENT TO AN AMOUNT OF FORMALDEHYDE WITHIN THE RANGE FROM 3 TO 25 PARTS OF FORMALDEHYDE PER 100 PARTS OF LIGNITE, TO A TEMPERATURE IN THE RANGE FROM 175* TO 375*F. FOR A TIME SUFFICIENT FOR A SUBSTANTIAL PORTION OF THE METHYLENIC AND SULFUR COMPOUNDSTO REACT WITH THE LIGNITE TO FORM SIDE CHAINS ON THE LIGNITE HAVING THE DORMULA-R-SO3M, WHEREIN-R-IS SELECTED FROM THE GROUP CONSISTING OF METHYLENE AND SUBSTITUTED METHYLENE RADICALS AND M IS AN ALKALI METAL.
Claim 2
Dependent Claim
155 words
A WELL DRILLING FLUID COMPRISING AN AQUEOUS DISPERSION OF CLAY CONTAINING A YIELD POINT REDUCING AMOUNT OF A WATER SOLUBLE LIGNITE DERIVATIVE MADE BY HEATING 100 PARTS OF LIGNITE IN AN ALKALINE LIQUID REACTION MEDIUM WITH 6 TO 50 PARTS OF A SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUROUS ACID AND WATER SOLUBLE SALTS THEREOF, A METHYLENIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND METHYL KETONES, SAID METHYLENIC COMPOUND BEING PRESENT IN AMOUNT STOICHIOMETRICALLY EQUIVALENT TO AN AMOUNT OF FORMALDEHYDE WITHIN THE RANGE FROM 3 TO 25 PARTS OF FORMALDEHYDE PER 100 PARTS OF LIGNITE, TO A TEMPERATURE IN THE RANGE FROM 175* TO 375*F. FOR A TIME SUFFICIENT FOR A SUBSTANTIAL PORTION OF THE METHYLENIC AND SULFUR COMPOUNDSTO REACT WITH THE LIGNITE TO FORM SIDE CHAINS ON THE LIGNITE HAVING THE DORMULA-R-SO3M, WHEREIN-R-IS SELECTED FROM THE GROUP CONSISTING OF METHYLENE AND SUBSTITUTED METHYLENE RADICALS AND M IS AN ALKALI METAL.
References Cited (Backward Citations)
US1736014A
Cited
US1736015A
Cited
US2172301A
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US2312449A
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US2331281A
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US2560380A
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US2650197A
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US2783201A
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US2813826A
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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) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |