1
David J Haas: Long term rapid color changing time indicator. Temtec, Michael E Zall, February 11, 1997: US05602804 (74 worldwide citation)

The time indicator device of this invention is provided with a display layer with at least one defined display region therein. A migration layer is provided which overlies and is attached to the display layer. The migration layer has at least one migration region therein and in use each migration re ...


2
David J Haas, Sandra F Haas: Long term rapid color changing time indicator. Temtec, Michael E Zall, May 27, 1997: US05633835 (57 worldwide citation)

A time indicator that rapidly changes color after a specific time interval is provided. The time indicator includes a base substrate with colored dye deposited on a first surface; a barrier applied over the colored dye; and a substrate having an adhesive on a first surface thereof. The substrate and ...


3
David J Haas: Long term rapid color changing time indicator employing dye absorbing layer. Temtec, Michael E Zall, October 13, 1998: US05822280 (51 worldwide citation)

A time indicator is provided that includes a front layer and a back layer, each having an inner and outer surface. The front layer has a display region on its outer surface. An adhesive means is provided on the inner surface of the front or back layer for adhesively attaching the front layer and bac ...


4
David J Haas, Robert J Holt, Leonard H Davis: Long term rapid color changing time indicator. Brady Worldwide, Quarles & Brady, November 21, 2006: US07139226 (17 worldwide citation)

A long term rapid color changing time indicator includes a front part and a back part. The front part includes a transparent layer, an opaque layer, a colorant layer, and a neutralizing layer. The colorant layer includes a matrix and a colorant having a non-migratory form that does not migrate in th ...


5
Roderick A Hyde, Tony S Pan: Time-dependent identification systems, methods, and uses thereof. ELWHA, October 3, 2017: US09779346

The present disclosure provides for identification systems and related methods of use. The disclosed identification systems can include a first ink and a second ink, each of which can comprise one or more time-dependent properties. The first and second inks can be disposed in a spatial pattern on a ...


6
Haas David J, Holt Robert J, Davis Leonhard H: Long term rapid color changing time indicator. Brady Worldwide, August 31, 2005: EP1569053-A2

A long term rapid color changing time indicator includes a front part and a back part. The front part includes a transparent layer, an opaque layer, a colorant layer, and a neutralizing layer. The colorant layer includes a matrix and a colorant having a non-migratory form that does not migrate in th ...


7
Haas David J: Long-term rapid color changing time indicator employing dye absorbing viewing layer. Temtec, April 7, 1999: EP0906591-A1

A time indicator (10) is provided that includes a front layer (12) and a back layer, each having an inner and outer surface. The front layer (12) has a display region (16) on its outer surface. An adhesion layer (36) is provided on the inner surface of the front or back layer for adhesively attachin ...


8
David J Haas, Robert J Holt, Leonard H Davis: Long term rapid color changing time indicator. Quarles & Brady, August 25, 2005: US20050185520-A1

A long term rapid color changing time indicator includes a front part and a back part. The front part includes a transparent layer, an opaque layer, a colorant layer, and a neutralizing layer. The colorant layer includes a matrix and a colorant having a non-migratory form that does not migrate in th ...


9
Haas David J: Long-term rapid color changing time indicator employing dye absorbing viewing layer. Temtec, ZALL Michael E, November 13, 1997: WO/1997/042551

A time indicator (10) is provided that includes a front layer (12) and a back layer, each having an inner and outer surface. The front layer (12) has a display region (16) on its outer surface. An adhesion layer (36) is provided on the inner surface of the front or back layer for adhesively attachin ...


10
TIME-DEPENDENT IDENTIFICATION SYSTEMS, METHODS, AND USES THEREOF. May 10, 2018: US20180129921-A1

The present disclosure provides for identification systems and related methods of use. The disclosed identification systems can include a first ink and a second ink, each of which can comprise one or more time-dependent properties. The first and second inks can be disposed in a spatial pattern on a ...