US2607730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid for use in well-boring operations
Assignee: Standard Oil Development Co
•
Filing: 1949-11-17
•
Granted: 1952-08-19
•
Expires: 1969-11-17
Abstract
No abstract record available.
Inventors
- 👤 Ragland Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:30
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A COMPOSITION COMPRISING A SUSPENSION OF FINELY DIVIDED SOLIDS IN AN AQUEOUS MEDIUM AND AN AMOUNT OF A 1:1 MIXTURE OF AN ALKALI METAL HYDROXIDE AND PULVERULENT CANAIGRE ROOT IN THE RANGE BETWEEN 2 AND 10 POUNDS PER 42 GALLON BARREL OF SAID SUSPENSION.
Claim 2
Dependent Claim
44 words
A COMPOSITION COMPRISING A SUSPENSION OF FINELY DIVIDED SOLIDS IN AN AQUEOUS MEDIUM AND AN AMOUNT OF A 1:1 MIXTURE OF AN ALKALI METAL HYDROXIDE AND PULVERULENT CANAIGRE ROOT IN THE RANGE BETWEEN 2 AND 10 POUNDS PER 42 GALLON BARREL OF SAID SUSPENSION.
References Cited (Backward Citations)
US1999766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |