Stabilization of concentrated suspensions of pesticide particles

Claim 1

A METHOD OF FORMING A STABLE SUSPENSION OF A NONWATER SOLUBLE ORGANIC PESTICIDE WHICH IS (1) NORMALLY CRYSTALLINE AND INSOLUBLE IN FAT IN THE RANGE OF TEMPERATURES BETWEEN 30 DEGREES AND 130 DEGREES F. AND (2) EITHER SOLUBLE IN FAT AT A TEMPERATURE ABOVE 130 DEGREES F. OR MELTS AT A TEMPERATURE BELOW THE BOILING POINT OF THE SUSPENDING LIQUID, THE TEMPERATURE AT WHICH THE PESTICIDE BECOMES SOLUBLE IN FAT OR MELTS BEING BELOW ITS DECOMPOSITION TEMPERATURE, AND (3) AT A CONCENTRATION IN SUSPENSION WHICH IS CAPABLE OF REMAINING IN A FLUID STATE SUITABLE FOR AGITATION AT ALL TEMPERATURES BELOW THAT AT WHICH IT EITHER DISSOLVES OR MELTS, WHICH COMPRISES: FORMING A LIQUID EMULSION OF FAT IN A WATER SOLUTION HEAVIER THAN WATER ALONE; INTRODUCING THE SOLID PESTICIDE INTO THE EMULSION; GRINDING THE SOLID PESTICIDE IN THE EMULSION TO A FINENESS OF THE ORDER OF 5 TO 15 MICRONS, THEREBY ADHERING A COATING OF FAT TO THE SOLIDS; SIMULTANEOUSLY AGITATING AND HEATING THE SUSPENSION ABOVE 130 DEGREES F. BUT BELOW THE BOILING POINT OF THE SUSPENDING LIQUID UNTIL THE SOLID PARTICLES DISAPPEAR; AND THEN GRADUALLY COOLING THE SUSPENSION, WHILE AGITATING IT, TO A TEMPERATURE BELOW 130 DEGREES F., THEREBY FORMING CRYSTALS WITHIN THE FAT GLOBULES OF THE SUSPENSION.

Claim 2

A METHOD OF FORMING A STABLE SUSPENSION OF A NONWATER SOLUBLE ORGANIC PESTICIDE WHICH IS (1) NORMALLY CRYSTALLINE AND INSOLUBLE IN FAT IN THE RANGE OF TEMPERATURES BETWEEN 30 DEGREES AND 130 DEGREES F. AND (2) EITHER SOLUBLE IN FAT AT A TEMPERATURE ABOVE 130 DEGREES F. OR MELTS AT A TEMPERATURE BELOW THE BOILING POINT OF THE SUSPENDING LIQUID, THE TEMPERATURE AT WHICH THE PESTICIDE BECOMES SOLUBLE IN FAT OR MELTS BEING BELOW ITS DECOMPOSITION TEMPERATURE, AND (3) AT A CONCENTRATION IN SUSPENSION WHICH IS CAPABLE OF REMAINING IN A FLUID STATE SUITABLE FOR AGITATION AT ALL TEMPERATURES BELOW THAT AT WHICH IT EITHER DISSOLVES OR MELTS, WHICH COMPRISES: FORMING A LIQUID EMULSION OF FAT IN A WATER SOLUTION HEAVIER THAN WATER ALONE; INTRODUCING THE SOLID PESTICIDE INTO THE EMULSION; GRINDING THE SOLID PESTICIDE IN THE EMULSION TO A FINENESS OF THE ORDER OF 5 TO 15 MICRONS, THEREBY ADHERING A COATING OF FAT TO THE SOLIDS; SIMULTANEOUSLY AGITATING AND HEATING THE SUSPENSION ABOVE 130 DEGREES F. BUT BELOW THE BOILING POINT OF THE SUSPENDING LIQUID UNTIL THE SOLID PARTICLES DISAPPEAR; AND THEN GRADUALLY COOLING THE SUSPENSION, WHILE AGITATING IT, TO A TEMPERATURE BELOW 130 DEGREES F., THEREBY FORMING CRYSTALS WITHIN THE FAT GLOBULES OF THE SUSPENSION.