Patents by Inventor Jan Jozef Priem

Jan Jozef Priem 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).

  • Polymerization of monomeric color couplets
    Patent number: 4080211
    Abstract: A process of making a color photographic material comprising a support and a layer comprising gelatin and as a color-coupling agent a water-insoluble homopolymer of a solid water-insoluble ethylenically unsaturated color coupling monomer or a water-insoluble copolymer of said monomer with a water-insoluble ethylenically unsaturated monomer, wherein the color-coupling agent is made by:Polymerizing an emulsion in water of a solution of a solid water-insoluble ethylenically unsaturated color coupling monomer capable of undergoing free radical addition polymerization at a temperature below the melting point of said monomer or a mixture thereof with a water-insoluble ethylenically unsaturated monomer, said solution being in a solvent for said monomer selected from the group consisting of organic solvents substantially inert with respect to said color coupling monomer and the free radical polymerization products thereof, liquid water-insoluble copolymerizable monomers and mixtures of such organic solvents and such
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: March 21, 1978
    Assignee: AGFA-GEVAERT N.V.
    Inventors: August Jean Van Paesschen, Jan Jozef Priem
  • Electrostatographic developers comprising a carrier bead coated with a copolymer of N-vinylcarbazole and trialkoxyvinylsilane and/or triacetoxyvinylsilane
    Patent number: 4039463
    Abstract: Carrier beads for use in an electrostatographic developer mixture comprise a glass core or iron-containing metal core enveloped with a coating of a copolymer of N-vinylcarbazole, trialkoxyvinylsilane and/or triacetoxyvinylsilane and optionally one or both of the monomers of the group consisting of C.sub.1 -C.sub.4 alkyl (meth)acrylate and styrene.
    Type: Grant
    Filed: April 16, 1975
    Date of Patent: August 2, 1977
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Pierre Richard De Roo, Walter Frans De Winter, Jan Jozef Priem, Yvan Karel Gilliams
  • Adhesion of hydrophilic layers on polyester film
    Patent number: 4001023
    Abstract: The adhesion of hydrophilic layers on a dimensionally stable polyester film support is improved by applying after longitudinal stretching of the polyester film a single adhesive layer thereon. The thus covered polyester film is stretched in transverse direction and heat-setted at 180.degree.-220.degree. C. The adhesive layer comprises 30 to 80 % by weight of a chlorine-containing copolymer, 5 to 30 % by weight of gelatin, 5 to 40 % by weight of a plasticizer for the gelatin and 0 to 30 % by weight of a metal-complexing antistatic agent.The polyester film may be a film of polyethylene terephthalate and the hydrophilic layer applied to the single adhesive layer may be a light-sensitive gelatin silver halide emulsion layer.
    Type: Grant
    Filed: June 3, 1975
    Date of Patent: January 4, 1977
    Assignee: AGFA-GEVAERT N.V.
    Inventors: August Jean Van Paesschen, Lucien Janbaptist Van Gossum, Jan Jozef Priem