Patents by Inventor Luc Van Steen

Luc Van Steen 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: 7040929
    Abstract: A substantially light-insensitive monosheet thermographic recording material comprising a support and on one side of said support a thermosensitive element, wherein said thermographic recording material contains at least one compound represented by formula (I): wherein M is hydrogen, an alkali atom or an ammonium group; R1 is an alkyl, alkenyl-, alkynyl-, thioalkyl-, thioalkenyl- or thioalkynyl-group in which the alkyl-, alkenyl- or alkynyl-group has 6 to 25 carbon atoms; X is —O—, —S— or —N(R2)—; and R2 is hydrogen, a —(CH2)mSO3M group or a group; and m is an integer between 1 and 5.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: May 9, 2006
    Assignee: Agfa-Gevaert
    Inventors: Geert Defieuw, Johan Loccufier, Luc Van Steen, Etienne Van Thillo
  • Publication number: 20050053871
    Abstract: A substantially light-insensitive monosheet thermographic recording material comprising a support and on one side of said support a thermosensitive element, wherein said thermographic recording material contains at least one compound represented by formula (I): wherein M is hydrogen, an alkali atom or an ammonium group; R1 is an alkyl, alkenyl-, alkynyl-, thioalkyl-, thioalkenyl- or thioalkynyl-group in which the alkyl-, alkenyl- or alkynyl-group has 6 to 25 carbon atoms; X is —O—, —S— or —N(R2)—; and R2 is hydrogen, a —(CH2)mSO3M group or a group; and m is an integer between 1 and 5.
    Type: Application
    Filed: June 23, 2003
    Publication date: March 10, 2005
    Applicant: Agfa-Gevaert N.V.
    Inventors: Geert Defieuw, Johan Loccufier, Luc Van Steen, Etienne Van Thillo
  • Patent number: 6156416
    Abstract: A transfer foil comprising a support with a thickness equal to or lower than 75 .mu.m and, directly adjacent to the support, an image receiving layer with a polymeric binder and having thickness d, a cohesive force F.sub.coh and adhering to the support with a force F.sub.rel characterised in that F.sub.rel >F.sub.coh. Preferably between the support and the image receiving layer a release layer is present.The cohesive force of the image receiving layer is controlled by adding a "promotor for cohesive break" to the layer. Such a promotor is selected from the group consisting of spacing particles with an average volume diameter d.sub.v50 >0.9d, waxes, polymers, different from the polymeric binder and cross-linking agents for the polymeric binder.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: December 5, 2000
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Eddie Daems, Werner Op de Beeck, Luc Van Steen
  • Patent number: 5674804
    Abstract: The present invention discloses a dye-donor element for use according to dye diffusion thermal transfer printing comprising on one side of a support a heat-resistant layer and on a side of the support opposite thereto a donor layer comprising a dye, a binder and a surfactant, said surfactant being a copolymer corresponding to the general formula (I) ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each independently represent an alkyl groupR.sup.4 represents an aralkyl groupm and n represent the molar fractions of the respective units in the copolymer and have a value of 0.01 to 0.99 with the provision that the sum of m and n equals 1.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: October 7, 1997
    Assignee: Agfa-Gevaert N.V.
    Inventors: Luc Van Steen, Marc Mannens
  • Patent number: 5474970
    Abstract: The present invention provides a dye-donor element for use according to thermal dye transfer methods comprising a support having on the front side a dye layer containing a thermally transferable dye and on the back side (i) a heat-resistant layer comprising a binder and (ii) optionally a topcoat layer, said heat-resistant layer and/or said topcoat layer comprising a polysiloxane based lubricant and wherein at least one layer on said back side comprises a salt of a fatty acid.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: December 12, 1995
    Assignee: Agfa-Gevaert N.V.
    Inventors: Geert Defieuw, Emiel Verdonck, Luc Van Steen
  • Patent number: 5436217
    Abstract: The present invention provides a method for making an image comprising the steps of:bringing a dye-layer comprised on the support of a dye donor element in face-to-face relationship with an image receiving layer comprised on a support of an image receiving element, said dye layer consisting of a repeating sequence of at least two dye frames each containing a dye dispersed or dissolved in a binder and,image-wise heating by means of thermal head each of said dye frames of said repeating sequence so as to cause image-wise transfer of dye from said dye layer to said image receiving layer characterised in that: said dye frames contain (a) particle(s) protruding from said dye layer, the last dye frame to be image-wise heated from said repeating sequence, containing said particle(s) in a reduced amount relative to the amount of said particle(s) in any of the other dye frames of said repeating sequence or alternatively said last dye frame being substantially free of said particle(s).
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: July 25, 1995
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Luc Van Steen, Emiel Verdonck, Geert Defieuw
  • Patent number: 5376149
    Abstract: Dye-receiving element for thermal dye sublimation transfer comprising a support having on one side a dye-receiving layer and, optionally on the other side a backcoat layer, the support carrying on at least one side a subbing layer comprising a copolyester formed by polycondensation of at least one aromatic dicarboxylic acid and at least one aliphatic diol, wherein the copolyester further comprises at least one comohomer having at least one sulfonate group in the acid form, alkalimetal salt form, and mixtures thereof.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: December 27, 1994
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Geert Defieuw, Luc Van Steen, Eric Mostaert, August Marien
  • Patent number: 5234888
    Abstract: Dye-donor element for use according to thermal dye sublimation transfer comprising a support having on one side a dye layer and on the other side a heat-resistant layer, characterized in that said heat-resistant layer comprises a polycarbonate derived from a bis-(hydroxyphenyl)-cycloalkane (diphenol) corresponding to formula (I) ##STR1## wherein: R.sup.1 and R.sup.2 (same or different) represent hydrogen, halogen, a C.sub.1 -C.sub.8 alkyl group, a C.sub.5 -C.sub.6 cycloalkyl group, a C.sub.6 -C.sub.10 aryl group or a C.sub.7 -C.sub.12 aralkyl group;X represents the necessary atoms to close a 5- to 8-membered cycloaliphatic ring which is substituted with one or more C.sub.1 -C.sub.6 alkyl groups or 5- or 6-membered cycloalkyl groups or carries fused-on 5- or 6-membered cycloalkyl groups.
    Type: Grant
    Filed: July 29, 1992
    Date of Patent: August 10, 1993
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Geert H. Defieuw, Emiel A. Verdonck, Luc A. Van Steen