US2970692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of barite
Assignee: NL Industries Inc
•
Filing: 1956-12-31
•
Granted: 1961-02-07
•
Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Henderson
- 👤 Orlando J Benston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:29
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A FORTH FLOTATION OF BARITE FROM ITS ORES, WHEREIN AN AAQUEOUS SUSPENSION OF COMMINUTED BARITE ORE IS AGITATED AND AERATED, THE STEP WHICH COMPRISES CARRYING OUT SAID FLOTATION IN THE PRESENCE OF AN ALKALI METAL SALT OF AN ALKYL HALF SULFATE ESTER HAVING FROM 8 TO 20 CARBON ATOMS IN THE ALKYL PORTION THEREOF, AND OF AN ALKALI METAL SALT OF A FATTY ACID HAVING FROM 8 TO 20 CARBON ATOMS, SAID ESTER AND SAID FATTY ACID BEING PRESENT IN A WEIGHT RATIO IN THE RANGE OF FROM 20:1 TO 1:2, SAID SULFATE ESTER SALT AND SAID FATTY ACID SALT CONSTITUTING THE FLOTATION AGENT FOR SAID BARITE.
Claim 2
Dependent Claim
108 words
IN A FORTH FLOTATION OF BARITE FROM ITS ORES, WHEREIN AN AAQUEOUS SUSPENSION OF COMMINUTED BARITE ORE IS AGITATED AND AERATED, THE STEP WHICH COMPRISES CARRYING OUT SAID FLOTATION IN THE PRESENCE OF AN ALKALI METAL SALT OF AN ALKYL HALF SULFATE ESTER HAVING FROM 8 TO 20 CARBON ATOMS IN THE ALKYL PORTION THEREOF, AND OF AN ALKALI METAL SALT OF A FATTY ACID HAVING FROM 8 TO 20 CARBON ATOMS, SAID ESTER AND SAID FATTY ACID BEING PRESENT IN A WEIGHT RATIO IN THE RANGE OF FROM 20:1 TO 1:2, SAID SULFATE ESTER SALT AND SAID FATTY ACID SALT CONSTITUTING THE FLOTATION AGENT FOR SAID BARITE.
References Cited (Backward Citations)
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Cited
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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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |