Radiation imagery chemistry: process – composition – or product th – Retrieving image made using radiation imagery
Reexamination Certificate
2007-02-27
2007-02-27
Chea, Thorl (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Retrieving image made using radiation imagery
C430S350000, C430S611000, C430S619000, C430S620000, C430S955000, C430S957000, C430S964000, C430S966000
Reexamination Certificate
active
10460129
ABSTRACT:
The present invention is directed to a method of forming a positive image in a photothermographic element comprising a potentially negative-working emulsion wherein fog density development is imagewise inhibited in exposed areas of the image upon thermal development. In one embodiment of the invention, a density-inhibiting agent is released during thermal development which agent inhibits the thermal development of unexposed silver salts in the exposed areas relative to the unexposed areas. The method preferably comprises imagewise exposing the film with a non-solarizing amount of radiation/energy to form a latent image and thermally developing the latent image in a single development step to produce a positive image in the element. The present invention is also directed to a photothermographic element that can be used in the present process in which a positive image characterized by high speed and discrimination is formed when exposed and thermally heated above 150° C.
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Black Donald L.
Gilman Paul B.
Roberts Michael R.
Schroeder Kurt M.
Chea Thorl
Eastman Kodak Company
Konkol Chris P.
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