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US3363758A
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Use of primary aliphatic ether amine acid salts in froth flotation process
Assignee: Ashland LLC
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Filing: 1966-12-08
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Granted: 1968-01-16
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Expires: 1986-12-08
Abstract
No abstract record available.
Inventors
- 👤 Alvin D Cronberg
- 👤 Clarence N Impola
- 👤 Thomas H Lentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:25
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2307397A
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US2372624A
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US2450720A
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US2839131A
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US3076819A
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US3251852A
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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) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |