Controlled-release chemical delivery device

FIG. 1 is a front elevation view of a controlled-release chemical delivery device showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is an enlarged partial view thereof taken along line 8 - 8 in FIG. 1 ; and,

FIG. 9 is a cross-section view thereof taken along line 9 - 9 in FIG. 8 .