US3265211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation with an amine composition
Assignee: Armour and Co
•
Filing: 1963-06-19
•
Granted: 1966-08-09
•
Expires: 1983-06-19
Abstract
No abstract record available.
Inventors
- 👤 Charles L Ray
- 👤 Robert E Baarson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:36
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A PROCESS FOR SEPARATING FINELY-DIVIDED MINERALS BY FROTH FLOTATION, THE IMPROVEMENT COMPRISING UTILIZATION OF EFFECTIVE QUANTITIES OF A FATTY AMINE HAVING ABOUT 8 TO 20 CARBON ATOMS AND A MIXTURE OF HETEROCYCLIC NITROGEN COMPOUNDS AS CONTAINED IN THE CRUDE, SEMIPURIFIED OR PURIFIED BY-PRODUCTS HAVING A BOILING POINT OF ABOUT 200*F. TO 750*F. RESULTING FROM REFINING OF GILSONITE.
Claim 2
Dependent Claim
58 words
IN A PROCESS FOR SEPARATING FINELY-DIVIDED MINERALS BY FROTH FLOTATION, THE IMPROVEMENT COMPRISING UTILIZATION OF EFFECTIVE QUANTITIES OF A FATTY AMINE HAVING ABOUT 8 TO 20 CARBON ATOMS AND A MIXTURE OF HETEROCYCLIC NITROGEN COMPOUNDS AS CONTAINED IN THE CRUDE, SEMIPURIFIED OR PURIFIED BY-PRODUCTS HAVING A BOILING POINT OF ABOUT 200*F. TO 750*F. RESULTING FROM REFINING OF GILSONITE.
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |