US2899392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reducing the consistency of
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:38
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A SINK-FLOAT SEPARATION PROCESS IN WHICH AN AQUEOUS SUSPENSION OF A HEAVY SOLID IS EMPLOYED AS A HEAVY MEDIUM FOR SUCH A SEPERATION, THE STEP WHICH COMPRISE INCORPORATING AN ALKYL AMINO COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL AMINES OF THE FORMULA CNH2N+1NH2, IN WHICH N IS AN INTEGER BETWEEN 6 AND 18 AND THEIR SALTS IN THE AQUEOUS SUSPENSION OF THE HEAVY SOLID EMPLOYED FOR SUCH SEPERATION MEDIUM TO REDUCE THE APPARENT VISCOSITY THEREOF, THE QUANITY OF HEAVY SOLID IN SUCH SUSPENSION BEING SO HIGH THAT IN THE ABSENCE OF SAID AMINO COMPOUND ITS APPARENT VISCOSITY WOULD BE TOO GREAT FOR USE AS A SINK-FLOAT SEPERATION MEDIUM.
Claim 2
Dependent Claim
110 words
IN A SINK-FLOAT SEPARATION PROCESS IN WHICH AN AQUEOUS SUSPENSION OF A HEAVY SOLID IS EMPLOYED AS A HEAVY MEDIUM FOR SUCH A SEPERATION, THE STEP WHICH COMPRISE INCORPORATING AN ALKYL AMINO COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL AMINES OF THE FORMULA CNH2N+1NH2, IN WHICH N IS AN INTEGER BETWEEN 6 AND 18 AND THEIR SALTS IN THE AQUEOUS SUSPENSION OF THE HEAVY SOLID EMPLOYED FOR SUCH SEPERATION MEDIUM TO REDUCE THE APPARENT VISCOSITY THEREOF, THE QUANITY OF HEAVY SOLID IN SUCH SUSPENSION BEING SO HIGH THAT IN THE ABSENCE OF SAID AMINO COMPOUND ITS APPARENT VISCOSITY WOULD BE TOO GREAT FOR USE AS A SINK-FLOAT SEPERATION MEDIUM.
References Cited (Backward Citations)
US2108495A
Cited
FR830341A
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US2320009A
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GB532103A
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US2286835A
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US2309931A
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US2331049A
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US2468657A
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US2568992A
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US2589949A
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US2599342A
Cited
US2719010A
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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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |