Patents by Inventor Jacques E. Wegmann

Jacques E. Wegmann 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).

  • Printing inks/dye liquors utilizing readily dispersible preparations of dyes and polyvinylacetals
    Patent number: 4197222
    Abstract: There is described a process for producing readily dispersible, nondusty dye preparations in granulated form, in which process difficultly water-soluble to water-insoluble dyes, pigments or optical brighteners, in a finely dispersed form, and water-insoluble carrier resins from the polyvinylacetal class are added, with vigorous shaking or stirring, to a two-phase system composed of water and a polar organic solvent having only limited solubility in the aqueous phase; the organic phase containing the dye and the carrier resin is dissipated by dilution with water; and the particles of the preparation are separated and freed from the aqueous, solvent-containing phase by rinsing and drying; the preparations which contain transferable dyes are especially useful for preparing a printing ink by dispersion in a liquid medium composed of water or of an organic solvent or of a mixture of water and an organic solvent; the printing inks thus obtained are themselves useful for printing paper which can be used in a transfe
    Type: Grant
    Filed: August 22, 1978
    Date of Patent: April 8, 1980
    Assignee: Ciba-Geigy AG
    Inventor: Jacques E. Wegmann
  • Process for the production of readily dispersible preparations of dyes and polyvinylacetals
    Patent number: 4130539
    Abstract: There is described a process for producing readily dispersible, nondusty dye preparations in granulated form, in which process difficultly water-soluble to water-insoluble dyes, pigments or optical brighteners, in a finely dispersed form, and water-insoluble carrier resins from the polyvinylacetal class are added with vigorous shaking or stirring, to a two-phase system composed of water and a polar organic solvent having only limited solubility in the aqueous phase; the organic phase containing the dye and the carrier resin is dissipated by dilution with water; and the particles of the preparation are separated and freed from the aqueous, solvent-containing phase by rinsing and drying; the preparations which contain transferable dyes are especially useful for preparing a printing ink by dispersion in a liquid medium composed of water or of an organic solvent or of a mixture of water and an organic solvent; the printing inks thus obtained are themselves useful for printing paper which can be used in a transfer
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: December 19, 1978
    Assignee: Ciba-Geigy AG
    Inventor: Jacques E. Wegmann