Patents by Inventor Leon Louis Vermeulen

Leon Louis Vermeulen 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).

  • Production of adhesive transfers by diffusion transfer
    Patent number: 4033770
    Abstract: Process and material for the production and use of pressure sensitive and for heat sensitive and/or solvent sensitive decalcomanias, formed according to the principles of the silver complex diffusion transfer process.
    Type: Grant
    Filed: April 4, 1975
    Date of Patent: July 5, 1977
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Louis Maria De Haes, Leon Louis Vermeulen, Hugo Karel Gevers, Walter Frans De Winter
  • Production of planographic printing patterns on aluminum sheets using solutions containing dicarboxylic acid compounds
    Patent number: 3989521
    Abstract: A process of producing a planographic printing plate by forming a diffusion transfer image on an aluminium sheet or foil or on a supported aluminium layer serving as image receiving material wherein the diffusion transfer of silver complexes from an image-wise exposed light-sensitive silver halide material onto said image receiving material is brought about with an alkaline aqueous processing liquid containing at least one compound being within the scope of the following formula:MOOC--X--COOMwherein X is either: --CH=CH--, ##SPC1##and M is an alkali metal.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: November 2, 1976
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Louis Maria De Haes, Camille Angelina Vandeputte, Leon Louis Vermeulen
  • Diffusion transfer process using silver halide emulsions with 90% chloride and high binder to silver halide ratios
    Patent number: 3985561
    Abstract: A process for producing continuous tone images on an image-receiving material in a diffusion transfer process.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: October 12, 1976
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Louis Maria De Haes, Leon Louis Vermeulen, Hugo Karel Gevers, Stephan Jeanne Bongaerts, Paul Desire Van Pee, Werner Krafft