Other

Klt Technology, Inc.

Klt Technologies, Inc.

Randall Lane

Steve Yeager

Carl M Lentz

Robert Guisinger

Floyd Ramp

Victor Uttinger

Justine Gaston

Visual and electronically readable temperature indicators and methods of making the same have an electric circuit with a microchip and a bridge within the circuit, and a facing material over the electric circuit. The bridge includes either a single layer or multiple layers that include a conductive material, a phase change material having a pre-selected melt temperature, a binder, a first colorant that is soluble in the phase change material and/or a second colorant that is a special effect pigment. In operation, at temperatures below the pre-selected melt temperature, the bridge is electrically conductive, and at a temperature at or above the pre-selected melt temperature, the phase change material melts and dilutes the conductive material, so that the bridge is electrically non-conductive, and a color change occurs that is visible to the user through the facing material such as through a transparent window or in an absorbent material.

Visual and electronically readable temperature indicator

A printable ink for reversible thermal indicators that includes microcapsules retaining therein a core material that is opaque as a solid and transparent as a liquid, and a binder and a rheology modifier as a carrier for the microcapsules. The binder and the rheology modifier are either the same substance or different substances. The microcapsules in the printable ink retain the core material therein for repeated, reversible transitions from solid to liquid and liquid to solid.

Single color reversible temperature indicator

A critical temperature indicator according to the present invention produces a visual, irreversible indication that the indicator has been subjected to a selected critical temperature. The critical temperature indicator includes a transparent housing, and a temperature sensitive transformable material operably contained within the transparent housing which includes mixture of water, nucleating agent (preferably ice nucleating active (INA) microorganisms), latex, and stabilizer which is translucent prior to exposure of a predetermined temperature and is transformed upon being subjected to the predetermined temperature to render a substantially consistent opaque material thus precluding visibility therethrough and thereby providing a sure visual sign that the indicator has been subjected to the predetermined temperature.

Critical temperature indicator

Growing community of inventors

Lebanon, OH, United States of America

Randall Lane