Patents by Inventor Paul Callant

Paul Callant 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).

  • Patent number: 8778590
    Abstract: A lithographic printing plate precursor comprising a coating provided on a support having a hydrophilic surface, the coating containing thermoplastic polymer particles and an IR-dye characterized in that the IR-dye contains a structural element according to Formula I wherein A represents hydrogen, halogen or a monovalent organic group; Y and Y? independently represent —CH— or —N—; R1 and R2 independently represent hydrogen, an optionally substituted alkyl or aryl group or represent the necessary atoms to form a ring; * represents the linking positions to the rest of the molecule.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: July 15, 2014
    Assignee: Agfa Graphics NV
    Inventor: Paul Callant
  • Publication number: 20140099482
    Abstract: A method for preparing a colour laser marked article comprising the steps of: a) infrared laser marking a security element including a polymeric support and a colour forming layer comprising a colour forming compound, an infrared dye and a polymeric binder comprising vinyl acetate and at least 85 wt % of vinyl chloride based on the total weight of the binder; and b) exposing the laser marked security element with light having a wavelength higher than 440 nm. The light exposure of step b) hinders the falsification of an issued security document without significant increase of background density.
    Type: Application
    Filed: May 10, 2012
    Publication date: April 10, 2014
    Applicant: Agfa-Gevaert N.V.
    Inventors: Bart Waumans, Paul Callant
  • Patent number: 8685622
    Abstract: a method for preparing a lithographic printing plate that includes imagewise exposing a lithographic printing plate precursor comprising a coating provided on a support having a hydrophilic surface, the coating containing thermoplastic polymer particles and an infrared radiation absorbing dye characterized in that the coating further comprises a phenolic stabilizer.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: April 1, 2014
    Assignee: Agfa Graphics NV
    Inventors: Johan Loccufier, Paul Callant, Jens Lenaerts, Ineke Van Severen
  • Patent number: 8632950
    Abstract: A lithographic printing plate precursor includes a cyanine dye, characterized in that the cyanine dye includes two different chromophoric groups, a chromophoric group that has its main absorption in the infrared region and another chromophoric group that has its main absorption in the visible light region.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: January 21, 2014
    Assignee: Agfa Graphics NV
    Inventor: Paul Callant
  • Patent number: 8563222
    Abstract: A lithographic printing plate precursor comprising an image-recording layer, said image-recording layer being photopolymerizable upon exposure to light having a wavelength of from 300 to 500 nm and containing a mixture of sensitizers.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: October 22, 2013
    Assignee: Agfa Graphics NV
    Inventors: Jan Venneman, Peter Hendrikx, Paul Callant, Alexander Williamson
  • Publication number: 20130233932
    Abstract: A security document precursor including, in order, at least: a) a transparent biaxially stretched polyethylene terephthalate foil; b) a colourless colour forming layer containing at least an infrared absorber, a colour forming component and a polymeric binder; and c) a polymeric support; wherein the colourless colour forming layer contains at least one component forming a compound having a melting temperature of less than 20° C. upon laser marking the colourless colour forming layer with an infrared laser. Methods for securing a security document using the security document precursor are also disclosed.
    Type: Application
    Filed: December 2, 2011
    Publication date: September 12, 2013
    Applicant: AGFA-GEVAERT N.V.
    Inventors: Bart Waumans, Ingrid Geuens, Paul Callant, Hubertus Van Aert
  • Publication number: 20130235145
    Abstract: A method of colour laser marking a security document precursor including, in order, at least: a) a polymeric foil; b) at least one colourless colour forming layer for generating a colour different from black containing at least an infrared absorber, a colour forming compound and a polymeric binder; and c) either a lasermarkable polymeric support or a lasermarkable layer for generating a black colour; comprising the steps of: (1) laser marking a colour different from black in the colourless colour forming layer with an infrared laser used in continuous wave mode; and (2) laser marking a black colour by carbonization in the lasermarkable polymeric support or the lasermarkable layer with the same infrared laser used in a pulsed mode; and wherein at least one of the polymeric foil and the lasermarkable polymeric support is transparent for the infrared light of the infrared laser.
    Type: Application
    Filed: November 28, 2011
    Publication date: September 12, 2013
    Applicant: AGFA-GEVAERT N.V.
    Inventors: Ingrid Geuens, Hubertus Van Aert, Paul Callant, Bart Waumans
  • Publication number: 20130230704
    Abstract: A method of colour laser marking an article having a polymeric foil with at least one colourless layer containing an infrared absorber, a polymeric binder and a colour forming compound; including the steps of:—laser marking the colourless layer with an infrared laser using a first laser operation mode to generate a blue or cyan colour; and—laser marking the same colourless layer with an infrared laser using a second laser operation mode to generate a black colour, wherein the first laser operation mode applies less energy to the colourless layer than the second laser operation mode.
    Type: Application
    Filed: December 6, 2011
    Publication date: September 5, 2013
    Applicant: AGFA-GEVAERT N.V.
    Inventors: Paul Callant, Ingrid Geuens, Bart Waumans, Hubertus Van Aert
  • Publication number: 20130229008
    Abstract: A security document precursor including, in order: a) at least one transparent biaxially stretched polyester foil; b) one colourless colour forming layer containing at least an infrared absorber, a colourless dye-precursor and a polymeric binder; and c) a polymeric support; wherein the polymeric binder is copolymer including at least 90 wt % of a chlorinated ethylene and 1 wt % to 10 wt % of vinyl acetate both based on the total weight of the binder. Methods for making the security document precursor are also disclosed.
    Type: Application
    Filed: December 6, 2011
    Publication date: September 5, 2013
    Applicant: AGFA-GEVAERT N.V.
    Inventors: Hubertus Van Aert, Ingrid Geuens, Paul Callant, Bart Waumans
  • Patent number: 8445176
    Abstract: A lithographic printing plate precursor comprising an image-recording layer, said image-recording layer being photopolymerizable upon exposure to light having a wavelength of from 300 to 500 nm and containing a mixture of sensitizers.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: May 21, 2013
    Assignee: Agfa Graphics NV
    Inventors: Jan Venneman, Peter Hendrikx, Paul Callant, Alexander Williamson
  • Patent number: 8409780
    Abstract: A heat-sensitive negative-working lithographic printing plate precursor comprising: a support having a hydrophilic surface or which is provided with a hydrophilic layer; and an image-recording layer comprising hydrophobic thermoplastic polymer particles, an infrared light absorbing dye and a dye; wherein said dye has a specified structure and a most bathochromic light absorption peak between 451 nm and 750 nm.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: April 2, 2013
    Assignee: AGFA Graphics NV
    Inventors: Paul Callant, Hieronymus Andriessen, Alexander Williamson
  • Patent number: 8304165
    Abstract: A heat-sensitive negative-working lithographic printing plate precursor comprising: a support having a hydrophilic surface or which is provided with a hydrophilic layer; and an image-recording layer comprising hydrophobic thermoplastic polymer particles and an infrared light absorbing dye; characterized in that: said image-recording layer further comprises a compound, said compound comprising an aromatic moiety and at least one acidic group or salt thereof and having a most bathochromic light absorption peak at a wavelength between 300 nm and 450 nm.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: November 6, 2012
    Assignee: AGFA Graphics NV
    Inventors: Hieronymus Andriessen, Paul Callant, Alexander Williamson
  • Publication number: 20120208126
    Abstract: A lithographic printing plate precursor includes a cyanine dye, characterized in that the cyanine dye includes two different chromophoric groups, a chromophoric group that has its main absorption in the infrared region and another chromophoric group that has its main absorption in the visible light region.
    Type: Application
    Filed: October 15, 2010
    Publication date: August 16, 2012
    Applicant: AGFA GRAPHICS NV
    Inventor: Paul Callant
  • Patent number: 8178282
    Abstract: A heat-sensitive imaging element includes an IR dye, and more particularly a heat-sensitive lithographic printing plate precursor includes the IR dye. A method for making the lithographic printing plate produces a print-out image of high contrast upon exposure to IR-radiation or heating.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: May 15, 2012
    Assignee: Agfa Graphics NV
    Inventors: Paul Callant, Hieronymus Andriessen, Alexander Williamson, Christel Geukens, Jos Louwet
  • Patent number: 8148042
    Abstract: A heat-sensitive imaging element includes an IR dye having a structure according to Formula I, wherein at least one of the Rd groups is a group which is transformed by a chemical reaction, induced by exposure to IR-radiation or heat, into a group which is a stronger electron-donor than the Rd; or wherein at least one of the Ra groups is a group which is transformed by a chemical reaction, induced by exposure to IR-radiation or heat, into a group which is a stronger electron-acceptor than the Ra. The imaging element is able to form a visible print-out image with a high contrast directly after image-wise exposure by IR-radiation or heating.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: April 3, 2012
    Assignee: Agfa Graphics NV
    Inventors: Paul Callant, Hieronymus Andriessen, Alex Williamson, Christel Geukens, Jos Louwet
  • Publication number: 20120034565
    Abstract: A lithographic printing plate precursor comprising a coating provided on a support having a hydrophilic surface, the coating containing thermoplastic polymer particles and an infrared radiation absorbing dye characterized in that the coating further comprises a phenolic stabilizer.
    Type: Application
    Filed: April 21, 2010
    Publication date: February 9, 2012
    Applicant: AGFA GRAPHICS NV
    Inventors: Johan Loccufier, Paul Callant, Jens Lenaerts, Ineke Van Severen
  • Publication number: 20110287364
    Abstract: A lithographic printing plate precursor comprising a coating provided on a support having a hydrophilic surface, the coating containing thermoplastic polymer particles and an IR-dye characterized in that the IR-dye contains a structural element according to Formula I wherein A represents hydrogen, halogen or a monovalent organic group; Y and Y? independently represent —CH— or —N—; R1 and R2 independently represent hydrogen, an optionally substituted alkyl or aryl group or represent the necessary atoms to form a ring; * represents the linking positions to the rest of the molecule.
    Type: Application
    Filed: December 3, 2009
    Publication date: November 24, 2011
    Applicant: AGFA GRAPHICS NV
    Inventor: Paul Callant
  • Publication number: 20110165518
    Abstract: A lithographic printing plate precursor includes a coating provided on a support having a hydrophilic surface, the coating containing thermoplastic polymer particles and an infrared radiation absorbing dye characterized in that the dye contains a substituent selected from bromo and iodo.
    Type: Application
    Filed: September 15, 2009
    Publication date: July 7, 2011
    Applicant: AGFA GRAPHICS NV
    Inventors: Paul Callant, Ineke Van Severen
  • Publication number: 20100274023
    Abstract: The present invention provides new intermediate compounds enabling the preparation of N-meso substituted cyanine, merocyanine or oxonole dyes wherein the N-meso substituent comprises electron withdrawing groups and wherein such N-meso substituents are introduced at the intermediate level. These intermediates enable the formation of dyes having in the meso-position N-substituents comprising electron withdrawing groups without the need for further derivatization of the meso-substituent at the dye level.
    Type: Application
    Filed: December 18, 2008
    Publication date: October 28, 2010
    Applicant: Agfa Graphics NV
    Inventors: Paul Callant, Jos Louwet
  • Publication number: 20100221662
    Abstract: A heat-sensitive imaging element includes an IR dye having a structure according to Formula I, wherein at least one of the Rd groups is a group which is transformed by a chemical reaction, induced by exposure to IR-radiation or heat, into a group which is a stronger electron-donor than the Rd; or wherein at least one of the Ra groups is a group which is transformed by a chemical reaction, induced by exposure to IR-radiation or heat, into a group which is a stronger electron-acceptor than the Ra. The imaging element is able to form a visible print-out image with a high contrast directly after image-wise exposure by IR-radiation or heating.
    Type: Application
    Filed: June 19, 2006
    Publication date: September 2, 2010
    Applicant: AGFA GRAPHICS NV
    Inventors: Paul Callant, Hieronymus Andriessen, Alex Williamson, Christel Geukens, Jos Louwet