Patent ID: 7569359

Claim:
An indicator device for use in determining the efficacy of an antimicrobial treatment process that includes a first process, comprising: an active agent responsive to exposure to a chemical of the antimicrobial treatment process; a carrier substrate; a first encapsulation component comprised of electrospun nanofibers including a first polymer, wherein the active agent is encapsulated by the first encapsulation component, the electrospun nanofibers of the first encapsulation component are deposited onto the carrier substrate in an electrospinning process; and a second encapsulation component comprised of electrospun nanofibers including a second polymer, wherein the electrospun nanofibers of the second encapsulation component are deposited onto the first encapsulation component in an electrospinning process, thereby covering the first encapsulation component, said second encapsulation component removable during the first process of the antimicrobial treatment process to expose the first encapsulation component to the chemical of the antimicrobial treatment process.