Time-temperature integrating indicator device
Color indicator-dosimeter of ionizing radiation
Process for detecting the completion of the sterilizing treatment using a color changing indicator composition
Jet printing ink composition
ApplicationNo. 423452 filed on 04/19/1995
US Classes:523/161, Invisible, ballpoint, or typewriter ink compositions or process of preparing; or composition for correction ribbons or correction fluids or process of preparing106/31.13, Inks106/31.18, Phenolic hydroxy compound as the developer106/31.27, Organic dye containing523/208, Solid polymer or solid polymer-forming system is or derived from an aldehyde or derivative524/508, With solid polymer derived from at least one reactant wherein at least one of the reactants forming the solid polymer is a phenol or inorganic phenolate; or with SPFI or SICP derived from phenol or inorganic phenolate wherein at least one of the necessary reactants is saturated524/509, With aldehyde or aldehyde-type reactant524/510Water DNRM containing
ExaminersPrimary: Jagannathan, Vasu S.
Assistant: Guarriello, John J.
Attorney, Agent or Firm
Foreign Patent References
International ClassC09D 011/10
AbstractThe invention relates to indicator ink compositions that contain a water-based dispersion of a phenol-formaldehyde resin, at least one colorant and an amine-terminated catalyst. These indicator ink compositions are fixed to a surface, such as by drying, and respond to specific conditions of time, temperature, humidity, pressure and the presence or absence of certain chemicals by changing color. Compositions provide a means for detecting exposure to a predetermined condition and can be fixed or otherwise attached to nearly any article or designed into patterns on materials. Exposure of the indicator ink to the specific condition, the indicator ink provides a permanent detectable record of the event. Further, by varying the amount of amine-terminated catalyst in the formulation, the specific conditions at which the indicator composition will change color can be altered. Such compositions are specifically useful for determining the effectiveness of a sterilization process.
Field of SearchLead pencil or marking crayon composition or process of preparing
Solid polymer or solid polymer-forming system is or derived from an aldehyde or derivative
With solid polymer derived from at least one reactant wherein at least one of the reactants forming the solid polymer is a phenol or inorganic phenolate; or with SPFI or SICP derived from phenol or inorganic phenolate wherein at least one of the necessary reactants is saturated
With aldehyde or aldehyde-type reactant
Water DNRM containing