S. C. Johnson Son, Inc.

Patrick J McCray

Robert R Emmrich

Brian T Davis

Robert D Iverson

Russell O Carlsen

Jill C Geyer

Disclosed herein are burnable air treatment chemical dispensing substrates, such as mosquito coils, in which wax is incorporated. In one form the wax portion is a separate coating layer in which the air treatment chemical is also placed. This permits the underlying base to be dried without loss of air treatment chemical. Methods for forming such coils are also disclosed.

Wax treated burnable dispensing substrates

The present invention provides an insect control coil that disperses an initial burst or quick release of a high concentration of insect active ingredient into the environment to provide a fast acting initial dose together with a sensory cue indicative of the release of the active substance. In order to accomplish this, the insect control coil includes a spiral-shaped body composed of a burnable material and having an insect control active substance as an ingredient thereof, a coating on the spiral-shaped body which contains an auxiliary amount of an insect control active substance which provides an auxiliary burst of active substance when burnt, and at least one of either the body or the coating further including a sensory cue indicative of the release of the reactive substance from the coating. The coating may be formed on the tip end of the body, or alternately, may be formed intermittently along the length of the body of the coil.

Growing community of inventors

Racine, WI, United States of America

Patrick J McCray