Patent US2919025A successfully refreshed from Google Patents.
US2919025A
Expired / Lapsed
US
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Flotation reagent composition
Assignee: Wyeth Holdings LLC
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Filing: 1956-04-04
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Granted: 1959-12-29
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Expires: 1976-04-04
Abstract
No abstract record available.
Inventors
- 👤 Booth Robert Ben
- 👤 Heeren James Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:32
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/17; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/025; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A COLLECTOR FOR FROTH FLOTATION CONTAINING AS ITS PRINCIPAL AND ESSENTIAL INGREDIENTS A MAJOR PORTION COMPRISING A MIXTURE IN COMPARABLE AMOUNTS OF MONOVALENT WATER-SOLUBLE SALTS OF DIALKYL MONOTHIOPHOSPHORIC ACID AND DIALKYL DITHIOPHOSPHORIC ACID TOGETHER WITH A SUBSTANTIAL BUT RELATIVELY MINOR PROPORTION COMPRISING THE CORRESPONDING O,O,S-TRIALKYL DITHIOPHOSPHATE AND O,O,OTRIALKYL MONOTHIOPHOSPHATE, THE ALKYL RADICALS BEING IDENTICAL LOWER-ALKYL RADICALS.
Claim 2
Dependent Claim
56 words
A COLLECTOR FOR FROTH FLOTATION CONTAINING AS ITS PRINCIPAL AND ESSENTIAL INGREDIENTS A MAJOR PORTION COMPRISING A MIXTURE IN COMPARABLE AMOUNTS OF MONOVALENT WATER-SOLUBLE SALTS OF DIALKYL MONOTHIOPHOSPHORIC ACID AND DIALKYL DITHIOPHOSPHORIC ACID TOGETHER WITH A SUBSTANTIAL BUT RELATIVELY MINOR PROPORTION COMPRISING THE CORRESPONDING O,O,S-TRIALKYL DITHIOPHOSPHATE AND O,O,OTRIALKYL MONOTHIOPHOSPHATE, THE ALKYL RADICALS BEING IDENTICAL LOWER-ALKYL RADICALS.
References Cited (Backward Citations)
US2198915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |