Patent US2988504A successfully refreshed from Google Patents.
US2988504A
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Clarification of acidic phosphatic solutions
Assignee: International Minerals and Chemical Corp
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Filing: 1957-12-30
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Granted: 1961-06-13
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Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mazurek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:02
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE PROCESS FOR THE CLARIFICATION OF AN ACIDIC INORGANIC PHOSPHATE SOLUTION CONTAINING SUSPENDED SOLID IMPURITIES WHICH COMPRISES AGITATING SAID SOLUTION WITH (A) AN ORGANIC CLARIFICATION AGENT SELECTED FROM THE GROUP CONSISTING OF TALL OIL, SOAP SKIMMINGS, TALL OIL PITCH, THE ROSIN THE UNSAPONIFICABLE FRACTION OF TALL OIL, THE ALIPHATIC FATTY ACIDS CONTAINING FROM ABOUT 10 TO ABOUT 20 CARBON ATOMS AND THE ALKALI METAL SOAPS THEREOF, THE ROSIN ACIDS AND THE ALKALI METAL SOAPS THEREOF, AND MIXTURES THEREOF, AND (B) AN INORGANIC CLARIFICATION AGENT COMPRISING AN ALKALI METAL SILICATE, SAID CLARIFYING AGENTS (A) AND (B) BEING EMPLOYED IN MINOR PROPORTIONS EFFECTIVE TO INCREASE THE SETTLING RATE OF SAID SUSPENDED SOLIDS, AND THEREAFTER MAINTAINING THE MIXTURE SO PRODUCED QUIESCENT TO SETTLE AT LEAST A SUBSTANTIAL PORTION OF SAID IMPURITIES AND SEPARATING THE CLARIFIED SUPERNATANT SOLUTION FROM SAID SETTLED IMPURITIES.
Claim 2
Dependent Claim
138 words
THE PROCESS FOR THE CLARIFICATION OF AN ACIDIC INORGANIC PHOSPHATE SOLUTION CONTAINING SUSPENDED SOLID IMPURITIES WHICH COMPRISES AGITATING SAID SOLUTION WITH (A) AN ORGANIC CLARIFICATION AGENT SELECTED FROM THE GROUP CONSISTING OF TALL OIL, SOAP SKIMMINGS, TALL OIL PITCH, THE ROSIN THE UNSAPONIFICABLE FRACTION OF TALL OIL, THE ALIPHATIC FATTY ACIDS CONTAINING FROM ABOUT 10 TO ABOUT 20 CARBON ATOMS AND THE ALKALI METAL SOAPS THEREOF, THE ROSIN ACIDS AND THE ALKALI METAL SOAPS THEREOF, AND MIXTURES THEREOF, AND (B) AN INORGANIC CLARIFICATION AGENT COMPRISING AN ALKALI METAL SILICATE, SAID CLARIFYING AGENTS (A) AND (B) BEING EMPLOYED IN MINOR PROPORTIONS EFFECTIVE TO INCREASE THE SETTLING RATE OF SAID SUSPENDED SOLIDS, AND THEREAFTER MAINTAINING THE MIXTURE SO PRODUCED QUIESCENT TO SETTLE AT LEAST A SUBSTANTIAL PORTION OF SAID IMPURITIES AND SEPARATING THE CLARIFIED SUPERNATANT SOLUTION FROM SAID SETTLED IMPURITIES.
References Cited (Backward Citations)
US1547732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |