US2649414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling mud
Assignee: Standard Oil Development Co
•
Filing: 1952-04-19
•
Granted: 1953-08-18
•
Expires: 1972-04-19
Abstract
No abstract record available.
Inventors
- 👤 Richard A Salathiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:50
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
85 words
A DRILLING MUD COMPRISING A WATER SOLUBLE SALT OF LIGNIN SULFONIC ACID IN AN AMOUNT IN THE RANGE BETWEEN 0.5 AND 20.0 POUNDS PER 42 GALLON BARREL OF SAID MUD, A WATER SOLUBLE SALT OF A SULFONATED PHENOL FORMALDEHYDE CONDENSATION PRODUCT IN AN AMOUNT IN THE RANGE BETWEEN 0.5 AND 10 POUNDS PER 42 GALLON BARREL OF SAID MUD, AT LEAST 5% BY WEIGHT OF FINELY DIVIDED SOLID MATERIAL, AND WATER CONTAINING NO MORE THAN 4.5% BY WEIGHT OF ALKALI METAL CHLORIDE AND NO MORE
Claim 2
Dependent Claim
85 words
A DRILLING MUD COMPRISING A WATER SOLUBLE SALT OF LIGNIN SULFONIC ACID IN AN AMOUNT IN THE RANGE BETWEEN 0.5 AND 20.0 POUNDS PER 42 GALLON BARREL OF SAID MUD, A WATER SOLUBLE SALT OF A SULFONATED PHENOL FORMALDEHYDE CONDENSATION PRODUCT IN AN AMOUNT IN THE RANGE BETWEEN 0.5 AND 10 POUNDS PER 42 GALLON BARREL OF SAID MUD, AT LEAST 5% BY WEIGHT OF FINELY DIVIDED SOLID MATERIAL, AND WATER CONTAINING NO MORE THAN 4.5% BY WEIGHT OF ALKALI METAL CHLORIDE AND NO MORE
References Cited (Backward Citations)
US2331281A
Cited
US2404038A
Cited
US2479061A
Cited
US2491436A
Cited
US2491437A
Cited
US2560280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |