Patents by Inventor Eric Kiekens

Eric Kiekens 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: 5936086
    Abstract: A novel class of non-sensitizing infra-red dyes derived from heptamethine dyes with indolenine nuclei is disclosed. They are useful as filter-, acutance- or antihalation dyes for photographic elements based on silver halide or for photothermographic elements.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: August 10, 1999
    Assignee: Agfa-Gevaert, N.V.
    Inventor: Eric Kiekens
  • Patent number: 5919609
    Abstract: The synthesis and the application of new dyes is described. In particular said new dyes can be incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolourised in alkaline aqueous liquids used in the processing of said materials. In photographic applications dyes of the general formula (I) are provided with at least one ionisable group which permits solubilisation in aqueous and/or alkaline medium. ##STR1## The meanings of the symbols are as defined in the claims and in the description.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: July 6, 1999
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant
  • Patent number: 5919610
    Abstract: The synthesis and the application of new dyes is described. In particular said new dyes can be incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolourised in alkaline aqueous liquids used in the processing of said materials. In photographic applications dyes of the general formula (I) are provided with at least one ionisable group which permits solubilisation in aqueous and/or alkaline medium. ##STR1## The meanings of the symbols are as defined in the claims and in the description.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: July 6, 1999
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant
  • Patent number: 5905166
    Abstract: A new type of yellow dyes with general formula Q-CO--CO--X is disclosed. They can be used in photographic materials as antihalation dyes, acutance dyes or filter dyes. Preferably they are incorporated in UV sensitive contact materials for pre-press applications.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: May 18, 1999
    Assignee: Agfa-Gevaert, N.V.
    Inventor: Eric Kiekens
  • Patent number: 5811545
    Abstract: The synthesis and the application of new dyes is described. In particular said new dyes can be incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolorised in alkaline aqueous liquids used in the processing of said materials. In photographic applications dyes of the general formula (I) are provided with at least one ionisable group which permits solubilization in aqueous and/or alkaline medium. ##STR1## The meanings of the symbols are as defined in the claims and in the description.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: September 22, 1998
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant
  • Patent number: 5811546
    Abstract: The synthesis and the application of new dyes is described. In particular said new dyes can be incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolorized in alkaline aqueous liquids used in the processing of said materials. In photographic applications dyes of the general formula (I) are provided with at least one ionisable group which permits solubilization in aqueous and/or alkaline medium. ##STR1## The meanings of the symbols are as defined in the claims and in the description.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: September 22, 1998
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant
  • Patent number: 5741632
    Abstract: A novel class of non-sensitizing infra-red dyes derived from heptamethine dyes with indolenine nuclei is disclosed. They are useful as filter-, acutance- or antihalation dyes for photographic elements based on silver halide or for photothermographic elements.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: April 21, 1998
    Assignee: Agfa-Gevaert, N.V.
    Inventor: Eric Kiekens
  • Patent number: 5691126
    Abstract: A new class of dyes useful in photographic materials as antihalation dyes, filter dyes or acutance dyes is disclosed. The dyes absorb in the spectral region 450-500 nm and are especially useful in photographic materials designed for recording by means of an Ar ion laser.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: November 25, 1997
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Eric Kiekens, Antonius Van Gils, Roland Claes
  • Patent number: 5688636
    Abstract: A new type of yellow dyes with general formula Q--CO--CO--X is disclosed. They can be used in photographic materials as antihalation dyes, acutance dyes or filter dyes. Preferably they are incorporated in UV sensitive contact materials for pre-press applications.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: November 18, 1997
    Assignee: AGFA-Gevaert, N.V.
    Inventor: Eric Kiekens
  • Patent number: 5624783
    Abstract: The present invention provides an imaging element comprising on one side of a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei in water permeable relationship with said emulsion layer and on the other side of the support at least one backing layer comprising gelatin and a dye and/or a dye precursor characterized in that said dye or dye precursor is such that after treatment of said imaging element in an alkaline solution with a pH of 10.9 for 20 s at a temperature of 30.degree. C. the backing layer has a reflection spectrum when treated for 20 s at 20.degree. C. in a neutralizing solution with a pH of 7.5 that is visually different from the reflection spectrum when treated for 20 s at 20.degree. C. in a neutralizing solution with a pH of 8.5.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: April 29, 1997
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Lode Deprez, Eric Kiekens
  • Patent number: 5502205
    Abstract: The synthesis and the application of new dyes is described. In particular said new dyes can be incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolourized in alkaline aqueous liquids used in the processing of said materials. In photographic applications dyes of the general formula (I) are provided with at least one ionizable group which permits solubilization in aqueous and or alkaline medium.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: March 26, 1996
    Assignee: Agfa-Gevaert N.V.
    Inventors: Eric Kiekens, Paul Callant
  • Patent number: 5478708
    Abstract: The synthesis and the application of new dyes is described. In particular said new dyes can be incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolorized in alkaline aqueous liquids used in the processing of said materials. In photographic applications dyes of the general formula (I) are provided with at least one ionizable group which permits solubilization in aqueous and/or alkaline medium.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: December 26, 1995
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant
  • Patent number: 5455218
    Abstract: The present invention provides a dye donor element for use according to the thermal dye transfer process. The dye donor element comprises on a support a dye layer comprising a binder and at least one heterocyclic dye according to formula (I): ##STR1## wherein the meanings of the symbols are as defined in the claims and the description.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: October 3, 1995
    Assignee: Agfa-Gevaert N.V.
    Inventors: Luc Vanmaele, Wilhelmus Janssens, Eric Kiekens
  • Patent number: 5420281
    Abstract: A photographic material is disclosed comprising a support, at least one silver halide emulsion layer, and optionally one or more non-photosensitive hydrophylic layer(s), characterized in that at least one of said emulsion layer(s) and/or non-photosensitive layer(s) contains a triphenylmethane dye, absorbing around 670 nm, represented by general formula (ID) : ##STR1## wherein R.sup.1 and R.sup.2 each independently represents hydrogen unsubstituted or substituted alkyl, or unsubstituted or substituted aryl,R.sup.3 represents an electron-withdrawing group, and the substance contains at least two water-solubilizing groups,and X.sup.- represents an anion, or an intramolecular anionic group.The triphenylmethane dyes can serve as filter dye, acutance dye, or anti-halation dye. The claimed photographic materials are especially suited for exposure by a laser diode emitting at 670 nm.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: May 30, 1995
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant, Roland Claes
  • Patent number: 5380634
    Abstract: The synthesis and the application of new dyes is described, said new dyes being incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolourized in alkaline aqueous liquids used in the processing of said materials. The filter dyes have an ester function or a derivative therefrom as a substituent at the mono- or trimethine chain.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: January 10, 1995
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant
  • Patent number: 5362612
    Abstract: A photographic material is disclosed comprising a support, at least one silver halide emulsion layer, and optionally one or more non-photosensitive hydrophylic layer(s), characterized in that at least one of said emulsion layer(s) and/or non-photosensitive layer(s) contains a triphenylmethane dye, absorbing around 670 nm, represented by general formula (ID): ##STR1## wherein R.sup.1 and R.sup.2 each independently represents hydrogen unsubstituted or substituted alkyl, or unsubstituted or substituted aryl, R.sup.3 represents an electron-withdrawing group, and the substance contains at least two water-solubilizing groups, and X.sup.- represents an anion, or an intramolecular anionic group.The triphenylmethane dyes can serve as filter dye, acutance dye, or anti-halation dye. The claimed photographic materials are especially suited for exposure by a laser diode emitting at 670 nm.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: November 8, 1994
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Eric Kiekens, Paul Callant, Roland Claes
  • Patent number: 5344749
    Abstract: The synthesis and the application of new dyes is described, said new dyes being incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolorized in alkaline aqueous liquids used in the processing of said materials. The filter dyes have an amide function or a derivative therefrom as a substituent at the mono- or trimethine chain.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: September 6, 1994
    Assignee: AGFA-Gevaert, N.R.
    Inventors: Eric Kiekens, Paul Callant