Chemistry: analytical and immunological testing – Process or composition for determination of physical state... – By thermoparticulating composition
Reexamination Certificate
2005-08-02
2005-08-02
Gakh, Yelena G. (Department: 1743)
Chemistry: analytical and immunological testing
Process or composition for determination of physical state...
By thermoparticulating composition
C374S102000, C374S104000, C374S106000
Reexamination Certificate
active
06924148
ABSTRACT:
A product shelf life monitoring system comprising an active substituted diacetylenic monomer component indicator composition is responsive to an integral of varying temperature over time to effect a solid state polymerization in the active monomer which results in a visible change in color density or the like at a rate designed to closely approximate the degradation, or shelf life, of an associated foodstuff or medicament product. The reactivity of the monomer component upon which the time-temperature integral of the indicator composition, and thus the represented shelf life, primarily depends may be readily varied by refluxing a solution of the monomer in a selected solvent for a predetermined time prior to recrystallization of the monomer for incorporation into the indicator composition.
REFERENCES:
patent: 4208186 (1980-06-01), Patel
patent: 4228126 (1980-10-01), Patel et al.
patent: 4276190 (1981-06-01), Patel
patent: 4298348 (1981-11-01), Ivory
Gakh Yelena G.
Handal Anthony H.
Kirkpatrick & Lockhart Nicholson & Graham LLP
TEMPTIME Corporation
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