Electro-catalytic photography

Claim 1

AN ELECTRO-CATALYTIC PHOTOGRPAHIC RECORDING MEDIUM COMPRISING A SEMICONDUCTOR OXIDE HAVING TWO OXIDATION STATES OF DIFFERENT COLOR, SAID OXIDE BEING SUBSTANTIALLY IN THE HIGHER STATE OF OXIDATION AND DOPED WITH AN IMPURITY IN A QUANTITY TO RENDER SAID SEMICONDUCTOR OXIDE SENSITIVE TO THE INTRODUCTION OF A RELATIVELY SMALL NUMBER OF METAL IONS OF A SOLID CATALYST WITH AN ELECTRIC FIELD TO CHANGE SAID OXIDE BY CATALYTIC ACTION FROM THE HIGHER TO A LOWER STATE OF OXIDATION, AND A PHOTOCONDUCTIVE MATERIAL DISTRIBUTED OVER A SURFACE SUBSTANTIALLY COEXTENSIVELY WITH SAID OXIDE.

Claim 3

THE METHOD OF PRODUCING A SUBSTANTIALLY PERMANENT VISIBLE PHOTOGRAPHIC RECORD CHARACTERISTIC OF A RADIATION IMAGE COMPRISING THE STEPS OF PROJECTING SAID IMAGE ON A SENSITIZED SURFACE COMPRISING A SEMICONDUCTOR MATERIAL HAVING TWO OXIDATION STATES OF DIFFERENT COLOR AND A PHOTOCONDUCTIVE MATERIAL, SAID SEMICONDUCTOR BEING SUBSTANTIALLY IN THE HIGHER STATE OF OXIDATION AND DOPED WITH AN IMPURITY IN A QUANTITY TO RENDER SAID SEMICONDUCTOR MATERIAL SENSITIVE TO THE INTRODUCTION OF A RELATIVELY SMALL NUMBER OF IONS OF A SOLID METAL CATALYST, PLACING A SOLID CATALYST SOURCE IN CONTACT WITH SAID SURFACE AND IMPRESSING AN ELECTRIC FIELD THROUGHOUT SAID SURFACE TO INJECT SAID METAL IONS OF SAID CATALYST INTO SAID SURFACE IN ACCORDANCE WITH THE CONDUCTIVITY OF SAID PHOTOCONDUCTIVE MATERIAL CAUSING SAID SEMICONDUCTOR MATERIAL TOCONVERT TO SAID LOWER OXIDATION STATE IN SELECTED AREAS THEREOF.

Claim 4

THE METHOD OF PRODUCING A SUBSTANTIALLY PERMANENT VISIBLE PHOTOGRAPHIC RECORD CHARACTERISTIC OF A RADIATION IMAGE COMPRISING THE STEPS OF PROJECTING SAID IMAGE ON A SENSITIZED SURFACE COMPRISING A SEMICONDUCTOR MATERIAL HAVING TWO OXIDATION STATES OF DIFFERENT COLOR AND A PHOTOCONDUCTIVE MATERIAL, SAID SEMICONDUCTOR BEING SUBSTANTIALLY IN THE HIGHER STATE OF OXIDATION AND DOPED WITH AN IMPURITY IN A QUANTITY TO RENDER SAID SEMICONDUCTOR MATERIAL SENSITIVE TO THE INTRODUCTION OF A RELATIVELY SMALL NUMBER OF IONS OF A SOLID METAL CATALYST, PLACING A SOLID CATALYST SOURCE IN CONTACT WITH SAID SURFACE AND IMPRESSING AN ELECTRIC FIELD THROUGHOUT SAID SURFACE TO INJECT SAID METAL IONS OF SAID CATALYST INTO SAID SURFACE IN ACCORDANCE WITH THE CONDUCTIVITY OF SAID PHOTOCONDUCTIVE MATERIAL CAUSING SAID SEMICONDUCTOR MATERIAL TOCONVERT TO SAID LOWER OXIDATION STATE IN SELECTED AREAS THEREOF.