US3147218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating mineral fines with cationic polyacrylamides
Assignee: Wyeth Holdings LLC
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Filing: 1959-04-24
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Granted: 1964-09-01
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Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 Robert B Booth
- 👤 William F Linke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:56
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D3/00; B03D3/06; C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B03D1/01; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS OF SEPARATING AQUEOUS ORE PULGS AND MINERAL SUSPENSIONS CONTAINING FINELY-DIVIDED MINERALS WHICH COMPRISES: ADDING TO SAID ORE PULPS AND MINERAL FINES, HAVING A PULP DENSITY OF LESS THAN ABOUT 70% BY WEIGHT SOLIDS, UNDER FLUOCCULATING CONDITIONS, A WATER-SOLUBLE CATIONIC POLYACRYLAMIDE OF THE FORMULA:
Claim 2
Dependent Claim
45 words
A PROCESS OF SEPARATING AQUEOUS ORE PULGS AND MINERAL SUSPENSIONS CONTAINING FINELY-DIVIDED MINERALS WHICH COMPRISES: ADDING TO SAID ORE PULPS AND MINERAL FINES, HAVING A PULP DENSITY OF LESS THAN ABOUT 70% BY WEIGHT SOLIDS, UNDER FLUOCCULATING CONDITIONS, A WATER-SOLUBLE CATIONIC POLYACRYLAMIDE OF THE FORMULA:
References Cited (Backward Citations)
US2995512A
Cited
US2923701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |