Patent US3009575A successfully refreshed from Google Patents.
US3009575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collection in flotation of sylvite
Assignee: General Mills Inc
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Filing: 1957-06-28
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Granted: 1961-11-21
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Expires: 1977-06-28
Abstract
No abstract record available.
Inventors
- 👤 James L Keen
- 👤 Joseph W Opie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:28
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR THE CONCENTRATION OF POTASSIUM CHLORIDE FROM A CRUDE ORE PULP CONTAINING POTASSIUM CHLORIDE PARTICLES, SODIUM CHLORIDE PARTICLES, AND MISCELLANEOUS IMPURITIES IN A SATURATED BRINE SOLUTION OF THE CRUDE MIXTURE WHICH COMPRISES ADDING TO SAID CRUDE ORE PULP A SUBSTANTIALLY COMPLETELY HYDROLYZED PRODUCT OF A FATTY IMIDAZOLINE HAVING THE GENERAL STRUCTURAL FORMULA:
Claim 2
Dependent Claim
54 words
A PROCESS FOR THE CONCENTRATION OF POTASSIUM CHLORIDE FROM A CRUDE ORE PULP CONTAINING POTASSIUM CHLORIDE PARTICLES, SODIUM CHLORIDE PARTICLES, AND MISCELLANEOUS IMPURITIES IN A SATURATED BRINE SOLUTION OF THE CRUDE MIXTURE WHICH COMPRISES ADDING TO SAID CRUDE ORE PULP A SUBSTANTIALLY COMPLETELY HYDROLYZED PRODUCT OF A FATTY IMIDAZOLINE HAVING THE GENERAL STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2215864A
Cited
US2329149A
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US2494132A
Cited
US2635079A
Cited
US2713583A
Cited
US2721657A
Cited
US2708666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |