1
Thaddeus Prusik, Raymond M Arnold, Allan P Piechowski: Activatable time-temperature indicator system. LifeLines Technology, Lionel N White, April 8, 2003: US06544925 (124 worldwide citation)

An activatable time-temperature indicator system useful in tracking the thermal exposure history of a temperature-sensitive perishable product and providing a visually-distinct signal, such as a change in color density, at the expiration of a predetermined time-temperature integral comprises a first ...


2
Thaddeus Prusik, Raymond M Arnold, Stephen C Fields: Time-temperature indicator device and method of manufacture. Lifelines Technology, Arthur J Plantamura, March 28, 2000: US06042264 (91 worldwide citation)

A time-temperature indicator label for measuring the length of time to which a product has been exposed to a temperature above a pre-determined temperature is provided. The period of time of exposure is integrated with the temperature to which the indicator is exposed. The label is a composite of a ...


3
Thaddeus Prusik, Raymond M Arnold, Stephen C Fields: Time-temperature indicator device and method of manufacture. LifeLines Technology, Arthur J Plantamura, January 20, 1998: US05709472 (78 worldwide citation)

A time-temperature indicator label for measuring the length of time to which a product has been exposed to a temperature above a pre-determined temperature is provided. The period of time of exposure is integrated with the temperature to which the indicator is exposed. The label is a composite of a ...


4
Himangshu R Bhattacharjee: Photoactivatable leuco base time-temperature indicator. LifeLines Technology, Arthur J Plantamura, April 17, 1990: US04917503 (62 worldwide citation)

A photoactivated time-temperature indicator is based on a leuco base system. A thermally insensitive, white ("inactive") leuco base (or a mixture of such leuco bases) is mixed, preferably in a polymeric matrix, with a material that generates acid upon exposure to light. Photoexcitation, preferably b ...


5
Himangshu R Bhattacharjee: Activatable time-temperature indicator. LifeLines Technology, Arthur J Plantamura, March 14, 1989: US04812053 (59 worldwide citation)

An activatable time-temperature indicator consists of an oxygen-sensitive reaction product of a triarylmethane dye and a decolorant that is coated on a substrate and covered by an oxygen barrier. Optinally, an oxygen-permeable layer is between the coating and the oxygen barrier. The indicator is act ...


6
Thaddeus Prusik, Raymond M Arnold: Multifunctional time-temperature indicator. LifeLines Technology, Arthur J Plantamura, October 15, 1991: US05057434 (59 worldwide citation)

An accurate monitoring of the conditions of a perishable product is achieved by integrating two indicator types - a primary indicator which develops a color change as a result of cumulative time-temperature exposure and a threshold second indicator - into a single device. The combination of the two ...


7
Himangshu R Bhattacharjee, James T Yardley, Thaddeus Prusik, Ronald R Chance: Photoactivatable time-temperature indicator. LifeLines Technology, Arthur J Plantamura, April 12, 1988: US04737463 (46 worldwide citation)

A photoactivated time-temperature indicator is based on diacetylenic salts. A thermally unreactive ("inactive") diacetylenic salt (or a mixture of such salts) is mixed, in a polymeric matrix, with a material that generates acid upon exposure to light. Photoexcitation, preferably by UV or near UV lig ...


8
Anthony F Preziosi, Thaddeus Prusik, Ray H Baughman: Defrost indicator. LifeLines technology, Arthur J Plantamura, January 9, 1990: US04892677 (28 worldwide citation)

A new process is described which is useful for producing novel articles of manufacture useful for monitoring the time-temperature history of perishable items. The process initially involves forming a solution comprised of a diacetylenic monomer and a solvent. The solution is frozen, and the frozen s ...


9
Anthony F Preziosi, Thaddeus Prusik: Metal complexed acetylenic compounds useful as environmental indicating materials. LifeLines Technology, Arthur J Plantamura, November 29, 1988: US04788151 (27 worldwide citation)

Acetylenic complexes are disclosed that are useful as environmental indicating materials whereby exposure thereof to environmental stimuli induces a color change. These complexes contain at least one effective complexing metal and at least one acetylenic compound of the general formula:


10
Anthony F Preziosi, Thaddeus Prusik, Ray H Baughman: Defrost indicator. LifeLines Technology, Arthur J Plantamura, April 5, 1988: US04735745 (25 worldwide citation)

A new process is described which is useful for producing novel articles of manufacture useful for monitoring the time-temperature history of perishable items. The process initially involves forming a solution comprised of a diacetylenic monomer and a solvent. The solution is frozen, and the frozen s ...