Patent ID: 8535740

Claim:
A method of making four, commercial-scale oil extract compositions from seeds of Nigella sativa consisting essentially of: a. grinding and sieving the seed of Nigella sativa to a fine powder of about 20 to 30 mesh; b. extracting commercial-scale quantities of the ground seeds with supercritical CO 2 at about 140 bar, at about 50° C. for about 30 minutes and collecting the oil fraction as the first extract composition (C1) obtained; c. setting aside C1 and continuing the extraction of the ground Nigella sativa seeds at about 140 bar, at about 50° C. for about 120 minutes and collecting the oil fraction as the second extract composition obtained (C2); d. setting aside C2 and continuing the extraction of the ground Nigella sativa seeds by increasing the pressure to about 300 bar, the temperature to about 60° C. and collecting the oil extract for about an additional 180 minutes as the third extract composition (C3) obtained; e. formulating fourth extract composition (C4) by mixing the extracted, spent N. sativa powdered seeds with the third extract composition (C3) in a ratio of about 24:1.