Paul Richard Josephson, JR
Engineers at Cherrystone Pl, Fort Collins, CO

5141839, Aug 25, 1992

Mar 27, 1991

7/676130

James E. Mitchell - Windsor CO
Paul R. West - Fort Collins CO
Paul R. Josephson - Fort Collins CO

Eastman Kodak Company - Rochester NY

G03F 7105, G03F 711, G03F 7038

430276

Negative-working lithographic printing plates comprise a radiation-sensitive composition having incorporated therein a photocrosslinkable polymer, containing the photosensitive group ##STR1## as an integral part of the polymer backbone, and a print-out composition which produces an optical density difference upon exposure to activating radiation and thereby enables the exposed image on the printing plate to be seen before the plate is processed. The print-out composition comprises a leuco form of a dye having one or more removable hydrogen atoms, the removal of which forms a compound colored differently from the leuco form; a photooxidant which has a photoscissionable nitrogen-oxygen bond, the photooxidant serving to convert the leuco dye to the differently colored form when the composition is exposed to activating radiation; and a heteroaromatic amine N-oxide which functions to improve the photo-efficiency of the print-out composition and thereby increase the print-out density.

5053315, Oct 1, 1991

Jul 17, 1990

7/554231

Paul R. West - Fort Collins CO
James E. Mitchell - Windsor CO
Gary R. Miller - Fort Collins CO
Paul R. Josephson - Fort Collins CO
Raymond W. Ryan - Fort Collins CO

Eastman Kodak Company - Rochester NY

G03C 177, G03F 7027

430278

Radiation-sensitive compositions which are especially useful in the production of negative-working lithographic printing plates comprise a photocrosslinkable polymer containing the photosensitive group ##STR1## as an integral part of the polymer backbone and, in an amount sufficient to improve the properties of the composition, an unsaturated polyester such as a polyester derived from fumaric acid and a 4,4'-isopropylidenediphenol. The unsaturated polyester additive improves the properties of the radiation-sensitive composition in regard to processing characteristics and ink receptivity and thereby provides a superior lithographic printing plate.

5045432, Sep 3, 1991

Jul 17, 1990

7/554229

Paul R. West - Fort Collins CO
James E. Mitchell - Windsor CO
Gary R. Miller - Fort Collins CO
Paul R. Josephson - Fort Collins CO
Raymond W. Ryan - Fort Collins CO

Eastman Kodak Company - Rochester NY

G03C 177, G03F 7038

430278

Radiation-sensitive compositions which are especially useful in the production of negative-working lithographic printing plates comprise a photocrosslinkable polymer containing the photosensitive group ##STR1## as an integral part of the polymer backbone and, in an amount sufficient to improve the properties of the composition, both a poly(N-acyl-alkyleneimine) and an unsaturated polyester such as a polyester derived from fumaric acid and a 4,4'-isopropylidenediphenol. The combination of a poly(N-acylalkyleneimine) and an unsaturated polyester improves the properties of the radiation-sensitive composition in regard to such factors as shelf life, image contrast, developability, ink receptivity and reduction in mottle and thereby provides a superior lithographic printing plate.

5141842, Aug 25, 1992

Mar 27, 1991

7/676131

James E. Mitchell - Windsor CO
Paul R. West - Fort Collins CO
Paul R. Josephson - Fort Collins CO

Eastman Kodak Company - Rochester NY

G03F 7038

430285

Radiation-sensitive compositions which are especially useful in the production of negative-working lithographic printing plates comprise a photocrosslinkable polymer, containing the photosensitive group ##STR1## as an integral part of the polymer backbone, and a print-out composition which produces an optical density difference upon exposure to activating radiation and thereby enables the exposed image on the printing plate to be seen before the plate is processed. The print-out composition comprises a leuco form of a dye having one or more removable hydrogen atoms, the removal of which forms a compound colored differently from the leuco form; a photooxidant which has a photoscissionable nitrogen-oxygen bond, the photooxidant serving to convert the leuco dye to the differently colored form when the composition is exposed to activating radiation; and a heteroaromatic amine N-oxide which functions to improve the photo-efficiency of the print-out composition and thereby increase the print-out density.

5043250, Aug 27, 1991

Jul 17, 1990

7/554239

Paul R. West - Fort Collins CO
James E. Mitchell - Windsor CO
Gary R. Miller - Fort Collins CO
Paul R. Josephson - Fort Collins CO

Eastman Kodak Company - Rochester NY

G03C 177, G03F 7004

430278

Radiation-sensitive compositions which are especially useful in the production of negative-working lithographic printing plates comprise a photocrosslinkable polymer containing the photosensitive group ##STR1## as an integral part of the polymer backbone and, in an amount sufficient to improve the properties of the composition, a poly(N-acyl-alkleneimine). The poly(N-acyl-alkyleneimine) improves the properties of the radiation-sensitive composition in regard to such factors as shelf life, image contrast, developability and reduction in mottle and thereby provides a superior lithographic printing plate.

5061600, Oct 29, 1991

Jul 17, 1990

7/554230

Paul R. West - Fort Collins CO
James E. Mitchell - Windsor CO
Gary R. Miller - Fort Collins CO
Paul R. Josephson - Fort Collins CO
Raymond W. Ryan - Fort Collins CO

Eastman Kodak Company - Rochester NY

E03C 177

430273

Radiation-sensitive compositions which are especially useful in the production of negative-working lithographic printing plates comprise a photocrosslinkable polymer containing the photosensitive group ##STR1## as an integral part of the polymer backbone and, in an amount sufficient to improve the properties of the composition, both a polymer of vinyl pyrrolidone and an unsaturated polyester such as a polyester derived from fumaric acid and a 4,4'-isopropylidine-diphenol. The combination of a polymer of vinyl pyrrolidone and an unsaturated polyester improves the properties of the radiation-sensitive composition in regard to such factors as shelf life, image contrast, developability and ink receptivity and thereby provides a superior lithographic printing plate.

5061601, Oct 29, 1991

Jul 17, 1990

7/554232

Paul R. West - Fort Collins CO
James E. Mitchell - Windsor CO
Gary R. Miller - Fort Collins CO
Paul R. Josephson - Fort Collins CO
Raymond W. Ryan - Fort Collins CO

Eastman Kodak Company - Rochester NY

G03C 177

430278

Radiation-sensitive compositions which are especially useful in the production of negative-working lithographic printing plates comprise a photocrosslinkable polymer containing the photosensitive group ##STR1## as an integral part of the polymer backbone and, in an amount sufficient to improve the properties of the composition, a polymer of vinyl pyrrolidone. The polymer of vinyl pyrrolidone improves the properties of the radiation-sensitive composition in regard to such factors as shelf life, image contrast, and developability and thereby provides a superior lithographic printing plate.