Patent US2811255A successfully refreshed from Google Patents.
US2811255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of molybdenite from copper sulfide-molybdenite flotation concentrates
Assignee: Individual
•
Filing: 1954-04-21
•
Granted: 1957-10-29
•
Expires: 1974-04-21
Abstract
No abstract record available.
Inventors
- 👤 Charles M Nokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:59
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; B03D1/002; B03D2201/00; B03D2201/02; B03D2201/06; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A PROCESS FOR THE RECOVERY OF MOLYBDENITE FROM A GENERAL FLOTATION CONCENTRATE OF MIXED MOLYBDENITE AND COPPER SULFIDES PRODUCED FROM A COPPER SULFIDE ORE PULP BY THE USE OF A COLLECTOR SELECTED FROM THE GROUP CONSISTING OF ORGANIC THIOPHOSPHATES AND XANTHIC ESTERS, COMPRISING CONDITIONING AN AQUEOUS PULP OF THE CONCENTRATE IN THE PRESENCE OF A REAGENT SELECTED FROM THE CLASS CONSISTING OF SOLUBLE INORGANIC ALKALINE, ALKALI METAL, AND ALKALI EARTH METAL COMPOUNDS OF:
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE RECOVERY OF MOLYBDENITE FROM A GENERAL FLOTATION CONCENTRATE OF MIXED MOLYBDENITE AND COPPER SULFIDES PRODUCED FROM A COPPER SULFIDE ORE PULP BY THE USE OF A COLLECTOR SELECTED FROM THE GROUP CONSISTING OF ORGANIC THIOPHOSPHATES AND XANTHIC ESTERS, COMPRISING CONDITIONING AN AQUEOUS PULP OF THE CONCENTRATE IN THE PRESENCE OF A REAGENT SELECTED FROM THE CLASS CONSISTING OF SOLUBLE INORGANIC ALKALINE, ALKALI METAL, AND ALKALI EARTH METAL COMPOUNDS OF:
Claim 3
Dependent Claim
14 words
SULFUR AND AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC, AND ANTIMONY
Claim 4
Dependent Claim
14 words
SULFUR AND AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC, AND ANTIMONY
Claim 5
Dependent Claim
1 words
SULFIDES
Claim 6
Dependent Claim
1 words
SULFIDES
Claim 7
Dependent Claim
1 words
CYANIDES
Claim 8
Dependent Claim
1 words
CYANIDES
Claim 9
Dependent Claim
1 words
HYPOCHLORITES;
Claim 10
Dependent Claim
1 words
HYPOCHLORITES;
References Cited (Backward Citations)
USRE22117E
Cited
US2293640A
Cited
US2559104A
Cited
US2608298A
Cited
US2492936A
Cited
US2664199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |