Patent ID: 7258868
Filing Date: 2007-08-21
Classification: A01M,A01N,A61L

Abstract:
1. A substrate impregnated with a volatile material comprising pyrethrum to be dispensed from the substrate, the substrate comprising: a substrate formed from a medium having pores and passages, the substrate having a pore size of between 15 μm and 30 μm; and having a polymeric material coating interior surfaces of the pores and passages, the substrate having a pore size of between 15 μm and 30 μm; and volatile material disposed in the pores; wherein the volatile material is more volatile than the polymeric material and the polymeric material inhibits the volatile material from clogging the substrate if the substrate is heated; and wherein the polymeric material is selected from the group consisting of polyalkylsiloxanes and polyalkylarylsiloxanes where an alkyl group in the polysiloxane is a C