4-(alkoxyhydroxy)styryl triazine photinitiators and photo sensit

4-(N,N-dialkylamino)aniline compound, photographic processing co

4-(N,N-dialkylamino)aniline compounds, photographic processing c

4-chlorooxazole derivatives and processes for their preparation

4-Halogeno-5-(halogenomethyl-phenyl)-oxazole derivatives, a proc

4-Hydroxyalkyl-substituted 3-pyrazolidinone electron transfer ag

4-Hydroxyalkyl-substituted 3-pyrazolidinone electron transfer ag

4-Hydroxyalkyl-substituted 3-pyrazolidinone electron transfer ag

4-Hydroxyalkyl-substituted 3-pyrazolidinone electron transfer ag

4-Substituted isoxazole compounds as co-developers for black-and

4H-pyran charge control agents for electrostatographic...

4H-Thiopyran-1,1-dioxide and electrophotographic layers and elem