Patent US4305338A successfully refreshed from Google Patents.
Patent US2591289A successfully refreshed from Google Patents.
US2591289A
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Frothing agents for use in froth flotation processes
Assignee: Individual
•
Filing: 1949-10-12
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Granted: 1952-04-01
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Expires: 1969-10-12
Abstract
No abstract record available.
Inventors
- 👤 Roger F Powell
- 👤 Stanley Herbert Muggleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:07
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D2201/00; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS OF CONCENTRATING MATERIAL COMPRISING SUBJECTING THE MATERIAL TO FROTH FLOTATION IN THE PRESENCE OF A COLLECTING AGENT AND A FROTHING AGENT CONSISTING ESSENTIALLY OF A TETRAALKOXY PARAFFIN HAVING IN THE PARAFFIN CHAIN FROM TWO TO FIVE CARBON ATOMS, A PAIR OF ALKOXY RADICALS SELECTED FROM THE GROUP METHOXY, ETHYOXY, NORMAL PROPOXY AND ISO-PROPOXY BEING ATTACHED TO EACH TERMINAL CARBON ATOM IN THE CHAIN.
Claim 2
Dependent Claim
65 words
A PROCESS OF CONCENTRATING MATERIAL COMPRISING SUBJECTING THE MATERIAL TO FROTH FLOTATION IN THE PRESENCE OF A COLLECTING AGENT AND A FROTHING AGENT CONSISTING ESSENTIALLY OF A TETRAALKOXY PARAFFIN HAVING IN THE PARAFFIN CHAIN FROM TWO TO FIVE CARBON ATOMS, A PAIR OF ALKOXY RADICALS SELECTED FROM THE GROUP METHOXY, ETHYOXY, NORMAL PROPOXY AND ISO-PROPOXY BEING ATTACHED TO EACH TERMINAL CARBON ATOM IN THE CHAIN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |