Patent US2857331A successfully refreshed from Google Patents.
US2857331A
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Flotation reagent
Assignee: SMITH DOUGLASS CO Inc
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Filing: 1955-12-12
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Granted: 1958-10-21
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Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 Clinton A Hollingsworth
- 👤 Karl F Schilling
- 👤 Jordan L Wester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:05
CPC Classifications
C; C09; C09F; C09F1/00; C09F1/04; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34; B03D1/008; B03D1/01; B03D2201/00; B03D2201/02; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A FLOTATION REAGENT COMPRISING THE POLYMERIZATION CONDENSATION REACTION PRODUCT OF FROM 2.5 TO 18 MOLECULAR EQUIVALENTS OF A COMMERCIALLY CRUDE PRODUCT SELECTED FROM THE GROUP CONSISTING OF CRUDE TALL OIL AND TALL OIL PITCH REACTED WITH ONE MOLECULAR EQUIVALENT OF A COMMERCIAL POLYALKYLENE POLYAMINE AT A TEMPERATURE OF FROM ABOUT 300 TO 425*F., AND CHARACTERIZED BY THE PROPERTY OF BEING CAPABLE OF EXERCISING REVERSIBLE POLARITY IN A FLOTATION OPERATION BY A VARIATION IN THE PH OF THE MINERAL PULP UNDERGOING FLOTATION.
Claim 2
Dependent Claim
81 words
A FLOTATION REAGENT COMPRISING THE POLYMERIZATION CONDENSATION REACTION PRODUCT OF FROM 2.5 TO 18 MOLECULAR EQUIVALENTS OF A COMMERCIALLY CRUDE PRODUCT SELECTED FROM THE GROUP CONSISTING OF CRUDE TALL OIL AND TALL OIL PITCH REACTED WITH ONE MOLECULAR EQUIVALENT OF A COMMERCIAL POLYALKYLENE POLYAMINE AT A TEMPERATURE OF FROM ABOUT 300 TO 425*F., AND CHARACTERIZED BY THE PROPERTY OF BEING CAPABLE OF EXERCISING REVERSIBLE POLARITY IN A FLOTATION OPERATION BY A VARIATION IN THE PH OF THE MINERAL PULP UNDERGOING FLOTATION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |