1
Rolf S Gabrielsen, Felice M Cerquone: Photothermographic, composition using a phenolic leuco dye as a reducing agent. Eastman Kodak Company, Richard E Knapp, October 12, 1976: US03985565 (47 worldwide citation)

In a photothermographic element, composition or process for producing developed images employing processing with heat, a combination comprising (a) photographic silver halide in association with (b) a silver salt of a long-chain fatty acid and (c) a phenolic leuco dye reducing agent for the silver s ...


2
Rolf S Gabrielsen, Patricia A Graham, James E Klijanowicz, Max H Stern: Color-forming sulfonamidodiphenylamines and corresponding sulfonimide dyes. Eastman Kodak Company, Richard E Knapp, February 12, 1985: US04499304 (16 worldwide citation)

Color-forming para-sulfonamidodiphenylamines and their corresponding sulfonimide dyes are useful in imaging materials. The color-forming sulfonamidodiphenylamines are prepared by condensation reactions. The corresponding sulfonimide dyes are formed by oxidation of the color-forming sulfonamidodiphen ...


3
Jonathan V Caspar, Harvey Walter Taylor Jr, Gregory C Weed, Rolf S Gabrielsen: Thermal imaging process and products using image rigidification. E I du Pont de Nemours and Company, September 25, 2001: US06294308 (6 worldwide citation)

Improved processes and products for laser thermal imaging are described. These improved processes and products utilize an image rigidification element and significantly reduce halftone dot movement, swath boundary cracking and banding.


4
Rolf S Gabrielsen, Patricia A Graham, James E Klijanowicz, Max H Stern: Color-forming para-sulfonamidodiphenylamine dye precursor and sulfonimide dye in photographic material and process. Eastman Kodak Company, Richard E Knapp, June 28, 1983: US04390606 (5 worldwide citation)

A color-forming para-sulfonamidodiphenylamine dye precursor in a photographic material and process enables formation of a sulfonimide dye image by means of cross-oxidation without the need for a coupling reaction. The color-forming para-sulfonamidodiphenylamine dye precursor is useful in a photograp ...


5
Rolf S Gabrielsen: Dye precursors and their use in photographic materials and processes. Eastman Kodak Company, Richard E Knapp, November 12, 1985: US04552980 (3 worldwide citation)

A diphenylamine compound that is a precursor for a phenazine dye comprises, in an ortho position to the amine of the diphenylamine, a sulfonyldiamido group (--NHSO.sub.2 NHR) that is capable of releasing a sulfonylamine fragment upon oxidation. The diphenylamine compound upon oxidation intramolecula ...


6
Rolf S Gabrielsen: Dye precursors and their use in photographic materials and processes. Eastman Kodak Company, Richard E Knapp, October 25, 1983: US04411984 (3 worldwide citation)

A diphenylamine compound that is a precursor for a phenazine dye comprises, in an ortho position to the amine of the diphenylamine, a sulfonyldiamido group (--NHSO.sub.2 NHR) that is capable of releasing a sulfonylamine fragment upon oxidation. The diphenylamine compound upon oxidation intramolecula ...


7
Rolf S Gabrielsen, Patricia A Graham, James E Klijanowicz: Color-forming sulfonamidodiphenylamine dye precursor that produces phenazine dye. Eastman Kodak Company, Richard E Knapp, April 19, 1983: US04380666 (3 worldwide citation)

A color-forming para sulfonamidodiphenylamine dye precursor has one or two sulfonamido groups in positions ortho to the amine --NH-- moiety separating the two phenyl rings of the para sulfonamidodiphenylamine and, in oxidized form, intramolecularly reacts to produce a sulfonamido-substituted phenazi ...


8
Rolf S Gabrielsen, Patricia A Graham, James E Klijanowicz: Photographic materials and processes comprising color-forming sulfonamidodiphenylamine dye precursors and corresponding phenazine dyes. Eastman Kodak Company, Richard E Knapp, January 11, 1983: US04368246 (3 worldwide citation)

In a photographic material for producing a dye image or a dye image and silver image comprising (1) a photographic metal salt, such as photographic silver halide, and (2) a dye precursor, improved images are provided by means of a color-forming para-sulfonamidodiphenylamine dye precursor having one ...


9
Rolf S Gabrielsen, Patricia A Graham, James E Klijanowicz: Color-forming sulfonamidodiphenylamine dye precursor that produces phenazine dye. Eastman Kodak Company, Richard E Knapp, March 26, 1985: US04507479 (2 worldwide citation)

A color-forming sulfonamidodiphenylamine dye precursor has sulfonamido groups in the ortho position and para position in relation to the --NH-- moiety of the sulfonamidodiphenylamine and, in oxidized form, intramolecularly reacts to produce a sulfonamido-substituted phenazine dye. Such color-forming ...


10
Jonathan V Caspar, Harvey Walter Taylor Jr, Gregory C Weed, Rolf S Gabrielsen: Thermal imaging process and products using image rigidification. E I du Pont de Nemours and Company, May 27, 2003: US06569585 (1 worldwide citation)

Improved processes and products for laser thermal imaging are described. These improved processes and products utlilize an image rigidification element and significantly reduce halftone dot movement, swath boundary cracking and banding.