Patent US2803345A successfully refreshed from Google Patents.
US2803345A
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Froth flotation process
Assignee: Distillers Co Yeast Ltd
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Filing: 1953-08-27
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Granted: 1957-08-20
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Expires: 1973-08-27
Abstract
No abstract record available.
Inventors
- 👤 Jacobs David Ian Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:37
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D2203/00; B03D2203/02; B03D2203/025; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
METHOD OF EFFECTING THE CONCENTRATION OF MINERALS BY FLOTATION WHICH COMPRISES THE STEP OF ADDING TO THE MINERAL PULP, IN THE CAPACITY OF A FROTHING AGENT, A DIESTER OF THE FORMULA
Claim 2
Dependent Claim
31 words
METHOD OF EFFECTING THE CONCENTRATION OF MINERALS BY FLOTATION WHICH COMPRISES THE STEP OF ADDING TO THE MINERAL PULP, IN THE CAPACITY OF A FROTHING AGENT, A DIESTER OF THE FORMULA
References Cited (Backward Citations)
US2690260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |