Patents by Inventor Paul Gestels

Paul Gestels has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for obtaining a printing plate according to the silver salt diffusion transfer process
    Patent number: 5432042
    Abstract: The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process using a photographic material comprising on a support a silver halide emulsion layer and a layer containing physical development nuclei comprising the steps of:image-wise exposing said photographic material anddeveloping a thus obtained image-wise exposed photographic material by guiding said image-wise exposed photographic material through an alkaline processing liquid in 15 s or less; characterized in that said alkaline processing liquid comprises a hydrophobizing compound having a mercapto group that has a pK.sub.a of 4.5 or less.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: July 11, 1995
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Lode Deprez, Jos Vaes, Paul Gestels