Chemistry: analytical and immunological testing – Process or composition for sterility or package integrity test
Patent
1995-02-28
1995-12-19
Housel, James C.
Chemistry: analytical and immunological testing
Process or composition for sterility or package integrity test
116219, 422 56, 422 57, 374102, G01K 1106
Patent
active
054767920
ABSTRACT:
A time-temperature indicator device for recording the duration of time over which a temperature has been established above a predetermined temperature, which device includes a dye-compatible polymer composition having a softening point above the predetermined temperature and a polymer-compatible dye composition in contact with the polymer composition and present in a quantity with respect to the polymer composition sufficient for diffusion through the polymer composition whenever the polymer composition is above the predetermined temperature, which quantity is selected so that the extent of diffusion corresponds to the duration of exposure above the predetermined temperature relative to the total time required for substantially complete diffusion. Articles for which a heat history above a predetermined temperature is to be record, in combination with the disclosed time-temperature indicator devices are also described. Methods for recording a duration of time over which a temperature has been established above a predetermined temperature utilizing the disclosed time-temperature indicator devices are also discussed.
REFERENCES:
patent: 3981683 (1976-09-01), Larsson et al.
patent: 4038873 (1977-08-01), Kimmel
patent: 4057029 (1977-11-01), Seiter
patent: 4212153 (1980-07-01), Kydonieus et al.
patent: 4423005 (1983-12-01), Murtaugh
patent: 4448548 (1984-05-01), Foley
patent: 4675161 (1987-06-01), Hashimoto
patent: 5120137 (1992-06-01), Ou-Yang
patent: 5152611 (1992-10-01), Pieper et al.
patent: 5153036 (1992-10-01), Sugisawa et al.
Barrett Richard B.
Ezrielev Robert I.
Housel James C.
Ludlow Jan M.
Temple Division, Air Liquide America Corporation
LandOfFree
Time-temperature indicator devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Time-temperature indicator devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-temperature indicator devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-991743