2-Substituted benzimidazoles in multicolor diffusion transfer
Additive color silver salt transfer film unit with layer of chit
Air purifier
Color correction process for color printing using electroluminsc
Color photographic diffusion transfer process
Combined system for removing contaminants from gas effluents
Cyanoethyl-containing blocked development restrainers
Diffusion transfer color products and processes employing silver
Diffusion transfer color products and processes with substituted
Diffusion transfer elements comprising color-providing compounds
Diffusion transfer photographic materials with color developer s
Diffusion transfer processes and elements using or containing in
Dust neutralizing and floculating system
Dye free, spectrally sensitive silver halide layers in diffusion
Image receiving elements comprising stannic oxide polymers havin
Method and apparatus for removing contaminants from gas streams
O-sulfonamidonaphthol diffusible dye image providing compounds
PHOTOGRAPHIC DIFFUSION TRANSFER FILMS, PROCESSES AND COMPOSITION
Photographic elements containing ballasted electron-accepting nu
Photographic film units containing colorless para-nitrobenzylide