Patent ID: 7278589

Claim:
An open gel delivery system in which an essentially constant release rate of active volatiles from the overall delivery system results from producing the gel system so as to provide that: b i O >1.2C i O , a i O >1.6C i O , the value of α | >2.5, where, α | =(α 1 ) (α 2 ) (α 3 ), wherein α 1 =a i O /b i O , α 2 =b i O /c i O , and α 3 =a i O /c i O and the value of β f /α 1 >3, where β F =(β 1 ) (β 2 ) (β 3 ), wherein β 1 =a F O /b F O , β 2 =b F O /c F O , and β 3 =a F O /c F O , wherein a i O is the largest value of x, y, or z at the initial condition, c i O is the smallest value of x, y, or z at the initial condition, b 1 O is the remaining value of x, y, or z at the initial condition, a F O is the largest value of x, y, or z at the final condition, c F O is the smallest value of x, y, or z at the final condition, and b F O is the remaining value of x, y, or z at the final condition, wherein initial condition and final condition refer to different dimensions of the gel system prior to volatilization, and after volatilization, respectively, and x=the dimension measured in the x direction of the projection of the gel system in the x-z plane; y=the dimension measured in the y direction of the projection of the gel system in the x-y plane; and z=the dimension measured in the z direction of the projection of the gel system in the x-z plane.