US2605221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of aqueous well-drilling fluids
Assignee: NL Industries Inc
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Filing: 1948-08-07
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Granted: 1952-07-29
•
Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Hoeppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE ART OF DRILLING WELLS BY THE EMPLOYMENT OF AN AQUEOUS MUD-LADEN DRILLING FLUID, THE PROCESS COMPRISING, ADDING TO SUCH A FLUID SUFFICIENT OF A COMPOUND THE CATION OF WHICH IS A NORMALLY FLOCCULATING HEAVY-METAL ION, IN THE PRESENCE OF SUFFICIENT OF A NON-ACID-FORMING NORMALLY DEFLOCCULATING PEPTIZING COMPOUND TO REDUCE THE CONSISTENCY OF THE DRILLING FLUID BY THE SYNERGISTIC ACTION OF THE COMPOUNDS TO BELOW THAT WHEN A LIKE AMOUNT OF THE DEFLOCCULATING COMPOUND IS USED ALONE.
Claim 2
Dependent Claim
78 words
IN THE ART OF DRILLING WELLS BY THE EMPLOYMENT OF AN AQUEOUS MUD-LADEN DRILLING FLUID, THE PROCESS COMPRISING, ADDING TO SUCH A FLUID SUFFICIENT OF A COMPOUND THE CATION OF WHICH IS A NORMALLY FLOCCULATING HEAVY-METAL ION, IN THE PRESENCE OF SUFFICIENT OF A NON-ACID-FORMING NORMALLY DEFLOCCULATING PEPTIZING COMPOUND TO REDUCE THE CONSISTENCY OF THE DRILLING FLUID BY THE SYNERGISTIC ACTION OF THE COMPOUNDS TO BELOW THAT WHEN A LIKE AMOUNT OF THE DEFLOCCULATING COMPOUND IS USED ALONE.
References Cited (Backward Citations)
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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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |