Colloidal dispersions of heavy metal compounds
First Claim
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1. A COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 0.001% TO ABOUT 1% BY WEIGHT OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF WATER-INSOLUBLE SALTS AND HYDROXIDES OF A HEAVY METAL OF GROUPS IB AND IIB OF THE PERIODIC TABLE DISPERSED IN AN AQUEOUS SOLUTION CONTAINING 0.05% TO 5% BY WEIGHT OF AN N-ALKYL BETAAMINO PROPIONIC ACID WHOSE ALKYL GROUP CONTAINS FROM 8 TO 14 CARBON ATOMS, SAID WATER-INSOLUBLE SALT BEING FORMED IN SITU, IN THE PRESENCE OF SAID N-ALKYL BETAAMINO PROPIONIC ACID, AS A TEMPORARILY STABLE DISPERSION OF VERY MINUTE PARTICLES WHICH INCREASE IN SIZE SLOWLY OVER A PERIOD OF FROM ABOUT 15 MINUTES TO ABOUT 40 HOURS BEFORE FLOCCULATING FROM SUSPENSION.
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1 Claim
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1. A COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 0.001% TO ABOUT 1% BY WEIGHT OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF WATER-INSOLUBLE SALTS AND HYDROXIDES OF A HEAVY METAL OF GROUPS IB AND IIB OF THE PERIODIC TABLE DISPERSED IN AN AQUEOUS SOLUTION CONTAINING 0.05% TO 5% BY WEIGHT OF AN N-ALKYL BETAAMINO PROPIONIC ACID WHOSE ALKYL GROUP CONTAINS FROM 8 TO 14 CARBON ATOMS, SAID WATER-INSOLUBLE SALT BEING FORMED IN SITU, IN THE PRESENCE OF SAID N-ALKYL BETAAMINO PROPIONIC ACID, AS A TEMPORARILY STABLE DISPERSION OF VERY MINUTE PARTICLES WHICH INCREASE IN SIZE SLOWLY OVER A PERIOD OF FROM ABOUT 15 MINUTES TO ABOUT 40 HOURS BEFORE FLOCCULATING FROM SUSPENSION.
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Current AssigneeJoseph B. Hoertz, William D. Stewart
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Original AssigneeJoseph B. Hoertz, William D. Stewart
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InventorsStewart, William D., Hoertz, Joseph B.
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Application NumberUS03/421,958Time in Patent Office936 DaysField of SearchUS Class Current516/78CPC Class CodesG03C 1/00 Photosensitive materials ph...Y10S 516/07 Organic amine, amide, or n-...
