US2957822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling muds useful in drilling trona beds
Assignee: FMC Corp
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Filing: 1957-11-27
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Granted: 1960-10-25
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Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 William R Frint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A SALT-BASED DRILLING MUD FOR USE AS A CIRCULATING FLUID IN A WELL IN DRILLING THROUGH ROCK FORMATIONS CONTAINING TRONA, SAID MUD CONTAINING COLLOIDS SELECTED FROM THE GROUP CONSISTING OF CLAY AND ORGANIC COLLOIDS, AND A SALT-BASED AQUEOUS BRINE COMPRISING ABOUT 20% TO 24% OF SODIUM CHLORIDE, ABOUT 3% TO 7% OF SODIUM CARBONATE, ABOUT 0.6% TO 3% OF SODIUM BICARBONATE, AND THE REMAINDER WATER.
Claim 2
Dependent Claim
65 words
A SALT-BASED DRILLING MUD FOR USE AS A CIRCULATING FLUID IN A WELL IN DRILLING THROUGH ROCK FORMATIONS CONTAINING TRONA, SAID MUD CONTAINING COLLOIDS SELECTED FROM THE GROUP CONSISTING OF CLAY AND ORGANIC COLLOIDS, AND A SALT-BASED AQUEOUS BRINE COMPRISING ABOUT 20% TO 24% OF SODIUM CHLORIDE, ABOUT 3% TO 7% OF SODIUM CARBONATE, ABOUT 0.6% TO 3% OF SODIUM BICARBONATE, AND THE REMAINDER WATER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |