EP 0127787 B1 19890315 - HYDROLYZABLE DIFFUSION CONTROL LAYERS IN PHOTOGRAPHIC PRODUCTS
Title (en)
HYDROLYZABLE DIFFUSION CONTROL LAYERS IN PHOTOGRAPHIC PRODUCTS
Publication
Application
Priority
US 49301383 A 19830509
Abstract (en)
[origin: EP0127787A2] Photographic diffusion transfer film units including polymeric diffusion control layers are disclosed. The diffusion control layers comprise polymers which are hydrolyzable in an alkaline medium so as to convert a layer comprising one or more of the polymers from a condition of impermeability to alkali or materials soluble in or solubilized by an aqueous alkaline processing composition to a condition of substantial permeability thereto.
IPC 1-7
IPC 8 full level
CPC (source: EP)
G03C 8/54 (2013.01)
Citation (examination)
US 4323644 A 19820406 - NAKAMURA TAKU, et al
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0127787 A2 19841212; EP 0127787 A3 19860611; EP 0127787 B1 19890315; AU 2776984 A 19841115; AU 558979 B2 19870219; CA 1219759 A 19870331; DE 3477275 D1 19890420; JP H0379702 B2 19911219; JP S59212836 A 19841201
DOCDB simple family (application)
EP 84105057 A 19840504; AU 2776984 A 19840508; CA 452993 A 19840427; DE 3477275 T 19840504; JP 9170784 A 19840508