Thermographic materials containing ionic liquids

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

Reexamination Certificate

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C430S618000, C430S619000, C430S620000

Reexamination Certificate

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11234691

ABSTRACT:
Ionic liquids are added to black-and-white direct thermographic materials to provide increased image density or to allow for reduced silver coverage (that is, improved silver efficiency). Useful ionic liquids include imidazolium, pyrazolium, pyridinium, pyrimidinium, pyrazinium, tetra-alkylammonium, or tetra-alkylphosphonium cations.

REFERENCES:
patent: 6531270 (2003-03-01), Olson et al.
patent: 6531273 (2003-03-01), Olson et al.
patent: 6586166 (2003-07-01), Olson et al.
patent: 2002/0018970 (2002-02-01), Hirabayashi
patent: 1 315 032 (2003-05-01), None
U.S. Appl. No. 11/234,711 (D-88581) filed on even date herewith, titled “Thermally Developable Materials Processable At Lower Temperatures” by Maskasky and Scaccia.

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