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Arunachalam T Ram, Joseph A Manico, Kathleen R Gisser, Peter J Cowdery Corvan, Thomas D Weaver: Time and temperature integrating indicator device. Eastman Kodak Company, Andrew J Anderson, August 15, 2000: US06103351 (40 worldwide citation)

Time and temperature integrating devices for providing a visually observable indication of cumulative thermal exposure are disclosed comprising (a) a substrate having thereon a thermally sensitive image-forming area comprising a combination of (i) an organic silver salt oxidizing agent and (ii) a re ...


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Robert P Foss, Thomas D Weaver: Radiation sensitive element with a dye-containing auxiliary layers. E I Du Pont de Nemours and Company, December 8, 1992: US05169747

Improved radiation-sensitive elements comprise a support; a radiation-sensitive layer; and an auxiliary layer comprising an absorbing amount of an anionic dye, and a synthetic amphoteric polymer comprising: acrylic acid and N,N-dialkylaminoethyl methacrylate; wherein alkyl=methyl or ethyl, the molar ...


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Thomas D Weaver: Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus. E I du Pont de Nemours and Company, April 2, 1991: US05004812

Compounds as defined having a 1-phenylindole nucleus substituted in the 2-position with a 3-pyridyl group. Such compounds are useful in the preparation of cyanine dyes which can be used to sensitize silver halide emulsions for fogged direct-positive films.


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Thomas D Weaver: Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus. E I Du Pont de Nemours and Company, May 22, 1990: US04927933

A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e.g., cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said cyanine dye is also covered. The dye useful i ...


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Thomas D Weaver: Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus. E I Du Pont de Nemours and Company, June 13, 1989: US04839271

A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e.g., cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said cyanine dye is also covered. The dye useful i ...