US3179250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating finely-divided minerals
Assignee: Armour and Co
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Filing: 1961-07-31
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Granted: 1965-04-20
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Fred H Bunge
- 👤 Robert E Baarson
- 👤 Harold B Treweek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D1/0043; B03D1/008; C; C09; C09K; C09K8/00; C09K8/58; C22; C22B; C22B1/00; C22B1/02; C22B1/14; B03D2201/00; B03D2201/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A PROCESS FOR SEPARATING FINELY-DIVIDED MINERALS BY FROTH FLOTATION, THE IMPROVEMENT COMPRISING MIXING DIRECTLY WITH A WATER SUSPENSION OF FINELY-DIVIDED MINERALS A FLOTATION AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY AMINES, PRIMARY AMINE SALTS AND MIXTURES THEREOF, AND A FLOTATION COLLECTOR SELECTED FROM THE GROUP CONSISTING OF ETHOXYLATED FATTY ACIDS AND AMIDES AND PROPOXYLATED FATTY ACIDS AND AMIDES, SAID FLOTATION COLLECTOR IMPROVING THE FLOTATION STRENGTH AND SELECTIVITY OF SAID FLOTATION AGENT.
Claim 2
Dependent Claim
73 words
IN A PROCESS FOR SEPARATING FINELY-DIVIDED MINERALS BY FROTH FLOTATION, THE IMPROVEMENT COMPRISING MIXING DIRECTLY WITH A WATER SUSPENSION OF FINELY-DIVIDED MINERALS A FLOTATION AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY AMINES, PRIMARY AMINE SALTS AND MIXTURES THEREOF, AND A FLOTATION COLLECTOR SELECTED FROM THE GROUP CONSISTING OF ETHOXYLATED FATTY ACIDS AND AMIDES AND PROPOXYLATED FATTY ACIDS AND AMIDES, SAID FLOTATION COLLECTOR IMPROVING THE FLOTATION STRENGTH AND SELECTIVITY OF SAID FLOTATION AGENT.
References Cited (Backward Citations)
DE1068191B
Cited
US2298281A
Cited
FR1096459A
Cited
US2816870A
Cited
GB803544A
Cited
US2914174A
Cited
FR1241821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |