Patents Assigned to Nocopi Technologies, Inc.
  • Patent number: 8822374
    Abstract: A color-changing marking system, including a color-changing marking medium and a substrate. The color-changing marking medium has a nominal color and includes a color developer activator and/or color former leuco dye. The substrate includes a treated portion on which a color former leuco dye and/or color developer activator has been applied. Application of the color-changing marking medium to an untreated portion of the substrate causes the color-changing marking medium to create marks of the nominal color. Application of the color-changing marking medium to the treated portion of the substrate causes the color-changing marking medium to create marks of a changed color in response to a chemical or mechanical reaction between the leuco dye and the activator. The marking medium may a crayon, colored pencil, marker ink or paint.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: September 2, 2014
    Assignee: Nocopi Technologies, Inc.
    Inventors: Terry W. Stovold, JoAnn Domanski
  • Publication number: 20130178362
    Abstract: A color-changing marking system, including a color-changing marking medium and a substrate. The color-changing marking medium has a nominal color and includes a color developer activator and/or color former leuco dye. The substrate includes a treated portion on which a color former leuco dye and/or color developer activator has been applied. Application of the color-changing marking medium to an untreated portion of the substrate causes the color-changing marking medium to create marks of the nominal color. Application of the color-changing marking medium to the treated portion of the substrate causes the color-changing marking medium to create marks of a changed color in response to a chemical or mechanical reaction between the leuco dye and the activator. The marking medium may a crayon, colored pencil, marker ink or paint.
    Type: Application
    Filed: January 6, 2012
    Publication date: July 11, 2013
    Applicant: NOCOPI TECHNOLOGIES, INC.
    Inventors: Terry W. Stovold, JoAnn Domanski
  • Patent number: 8053494
    Abstract: An invisible ink, a method for preparing an invisible ink, and an invisible ink product are disclosed herein. An invisible ink comprising a first ink combined with a second ink is applied to a print medium. The first ink comprises a color developer activator without a color former leuco dye and the second ink comprises a color former leuco dye without a color developer activator. The first ink is prepared with a polyvinyl alcohol binder, dispersant/surfactant, and a wetting agent. The second ink is prepared with a polyvinyl alcohol binder, grind aid, dispersant/surfactant and defoamer. Heat generated by rubbing and/or scratching the invisible ink on the print medium activates the color former leuco dye and activator to change the color on the printing medium.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: November 8, 2011
    Assignee: Nocopi Technologies, Inc.
    Inventors: Terry W. Stovold, JoAnn Domanski
  • Publication number: 20100059984
    Abstract: A method and system of document authentication comprise applying a neutralizer security ink to a paper document to be authenticated, the neutralizer security ink neutralizing a reactant in the paper document. A color changing security ink is applied to the paper document to be authenticated at least to an area where the neutralizer security ink was applied, the color changing security ink having a first security color and a second security color. A test solution is applied to the paper document to be authenticated at least on the area where the neutralizer security ink and color changing security ink have both been applied. The application of the test solution to the area where the neutralizer security ink and color changing security ink have both been applied causes the color changing security ink to change from the first security color to the second security color.
    Type: Application
    Filed: September 8, 2008
    Publication date: March 11, 2010
    Applicant: NOCOPI TECHNOLOGIES, INC.
    Inventors: JoAnn Domanski, Richard J. Selah
  • Publication number: 20080113862
    Abstract: An invisible ink, a method for preparing an invisible ink, and an invisible ink product are disclosed herein. An invisible ink comprising a first ink combined with a second ink is applied to a print medium. The first ink comprises a color developer activator without a color former leuco dye and the second ink comprises a color former leuco dye without a color developer activator. The first ink is prepared with a polyvinyl alcohol binder, dispersant/surfactant, and a wetting agent. The second ink is prepared with a polyvinyl alcohol binder, grind aid, dispersant/surfactant and defoamer. Heat generated by rubbing and/or scratching the invisible ink on the print medium activates the color former leuco dye and activator to change the color on the printing medium.
    Type: Application
    Filed: January 10, 2008
    Publication date: May 15, 2008
    Applicant: Nocopi Technologies, Inc.
    Inventors: Terry Stovold, JoAnn Domanski
  • Patent number: 6140267
    Abstract: A method and substrate for printing information wherein at least one coating is applied to a substrate, the coating having a colorformer leucodye and at least one color activator. The colorformer leucodye and at least one activator react when heated to exhibit a chromic change of at least one of a color change visible in normal light and a fluorescence visible only in ultraviolet light. The at least one coating is heated with at least one laser beam to effect the chromic change at selected points to thereby print information.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: October 31, 2000
    Assignee: Nocopi Technologies, Inc.
    Inventor: Arshavir Gundjian
  • Patent number: 6114281
    Abstract: A method and compositions for authenticating a document or article comprises applying a mixture of a carrier, a leuco dye and an activator to a surface of a document or article, wherein the leuco dye and activator react in response to a rubbing force applied to the surface to change color and wherein the activator is at least one selected from the group consisting of amidophenol, anilides with hydroxyl groups and benzoamides with hydroxyl groups and authenticating the document or article by applying a rubbing force to the surface to effect a color change.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: September 5, 2000
    Assignee: Nocopi Technologies, Inc.
    Inventors: Blake Quenten Belding, JoAnn Silknitter, Kevin Bruce Stevenson, Terry William Stovold
  • Patent number: 6106110
    Abstract: A composition and a method and an apparatus for using the composition for secure thermal ink jet printing on a substrate. The thermal ink jet ink composition is clear and is invisible to an unaided human eye in visible light when printed on the substrate.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: August 22, 2000
    Assignee: Nocopi Technologies, Inc.
    Inventors: Arshavir Gundjian, Warren Solodar
  • Patent number: 6086966
    Abstract: A method for authenticating a textile product, wherein a colorless composition is applied to at least one portion of at least one thread of the textile product. The composition comprises one of a pair of a colorformer and an activator which react when mixed to produce a spectral response. The textile product is authenticated as genuine by applying the other of the pair of the colorformer and activator to at least one portion of the at least one thread to produce the spectral response. The textile product may be a thread or a woven label.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: July 11, 2000
    Assignee: Nocopi Technologies, Inc.
    Inventors: Arshavir Gundjian, Abraham Kuruvilla
  • Patent number: 6013601
    Abstract: A method and substrate for printing information wherein at least one coating is applied to a substrate, the coating having a colorformer leucodye and at least one color activator. The colorformer leucodye and at least one activator react when heated to exhibit a chromic change of at least one of a color change visible in normal light and a fluorescence visible only in ultraviolet light. The at least one coating is heated with at least one laser beam to effect the chromic change at selected points to thereby print information.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: January 11, 2000
    Assignee: Nocopi Technologies, Inc.
    Inventor: Arshavir Gundjian
  • Patent number: 5941572
    Abstract: A method for authenticating a textile product, wherein a colorless composition is applied to at least one portion of at least one thread of the textile product. The composition comprises one of a pair of a colorformer and an activator which react when mixed to produce a spectral response. The textile product is authenticated as genuine by applying the other of the pair of the colorformer and activator to at least one portion of the at least one thread to produce the spectral response. The textile product may be a thread or a woven label.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: August 24, 1999
    Assignee: Nocopi Technologies, Inc.
    Inventors: Arshavir Gundjian, Abraham Kuruvilla
  • Patent number: 5786509
    Abstract: A method and compositions for authenticating a document or article comprises applying a mixture of a carrier, a leuco dye and an activator to a surface of a document or article, wherein the leuco dye and activator react in response to a rubbing force applied to the surface to change color and wherein the activator is at least one selected from the group consisting of amidophenol, anilides with hydroxyl groups and benzoamides with hydroxyl groups and authenticating the document or article by applying a rubbing force to the surface to effect a color change.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: July 28, 1998
    Assignee: Nocopi Technologies, Inc.
    Inventors: Blake Quenten Belding, JoAnn Silknitter, Kevin Bruce Stevenson, Terry William Stovold
  • Patent number: 5774160
    Abstract: A latent image printing method and apparatus uses a substrate with one main surface having a covering comprising one of a first pair of a color developer and color former dye defining a background color in conjunction with the one main surface, wherein the color developer and the color former dye react when mixed to produce a first spectral response which is visible relative to the background color and a continuous coating over the covering which is non-porous with respect to the other of the pair and solvent-resistant to the other of the pair. The coating above selected portions of the covering corresponding to a desired latent image is removed.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: June 30, 1998
    Assignee: Nocopi Technologies, Inc.
    Inventor: Arshavir Gundjian
  • Patent number: 5750462
    Abstract: A latent image printing method and apparatus uses a substrate with one main surface having a covering comprising only one of a first pair of a color developer and color former dye in at least one selected latent imaging area defining a background color in conjunction with the one main surface, wherein the color developer and the color former dye react when mixed to produce a first spectral response which is visible relative to the background color and a continuous coating over the covering which is non-porous with respect to the other of the pair and solvent-resistant to the other of the pair. The coating above selected portions of the covering corresponding to a desired latent image is removed.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: May 12, 1998
    Assignee: Nocopi Technologies, Inc.
    Inventor: Arshavir Gundjian
  • Patent number: 5682193
    Abstract: A latent image printing method and apparatus uses a substrate with one main surface having a covering comprising one of a first pair of a color developer and color former dye defining a background color in conjunction with the one main surface, wherein the color developer and the color former dye react when mixed to produce a first spectral response which is visible relative to the background color and a continuous coating over the covering which is non-porous with respect to the other of the pair and solvent-resistant to the other of the pair. The coating above selected portions of the covering corresponding to a desired latent image is removed.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: October 28, 1997
    Assignee: Nocopi Technologies, Inc.
    Inventor: Arshavir Gundjian
  • Patent number: 5595590
    Abstract: A method and compositions for authenticating a document or article comprises applying a mixture of a carrier, a leuco dye and an activator to a surface of a document or article, wherein the leuco dye and activator react in response to a rubbing force applied to the surface to change color and wherein the activator is at least one selected from the group consisting of amidophenol, anilides with hydroxyl groups and benzoamides with hydroxyl groups and authenticating the document or article by applying a rubbing force to the surface to effect a color change.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: January 21, 1997
    Assignee: Nocopi Technologies, Inc.
    Inventors: Blake Q. Belding, JoAnn Silknitter, Kevin B. Stevenson, Terry W. Stovold
  • Patent number: 5516362
    Abstract: A security marking method and composition wherein a first marking is applied to a surface of a substrate with a mixture of a printing medium and a first composition, wherein the first marking is visible to an unaided human eye and is indistinguishable from a marking applied with the printing medium alone, to an unaided human eye when illuminated by visible light or ultraviolet light. A second composition is added either with the mixture or thereafter, wherein the second composition is reactable with the first composition to fluoresce and wherein the fluorescing is only visible to an unaided human eye when illuminated by ultraviolet light.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: May 14, 1996
    Assignee: Nocopi Technologies, Inc.
    Inventors: Arshavir Gundjian, Abraham Kuruvilla
  • Patent number: 5424266
    Abstract: A latent image printing method and apparatus uses a substrate with one main surface having a covering comprising only one of a first pair of a color developer and color former dye in at least one selected latent imaging area defining a background color in conjunction with the one main surface, wherein the color developer and the color former dye react when mixed to produce a first spectral response which is visible relative to the background color and a continuous coating over the covering which is non-porous with respect to the other of the pair and solvent-resistant to the other of the pair. The coating above selected portions of the covering corresponding to a desired latent image is removed.
    Type: Grant
    Filed: December 24, 1992
    Date of Patent: June 13, 1995
    Assignee: Nocopi Technologies, Inc.
    Inventor: Arshavir Gundjian
  • Patent number: 5421869
    Abstract: A security marking method comprises marking a portion of the substrate by applying a first marking fluid which is invisible to a unaided eye when illuminated by both visible light and ultraviolet light and activating the marked portion by applying a second marking fluid thereon. The second marking fluid is reactable with the first marking fluid to be invisible to an unaided human eye when illuminated by visible light and fluorescent when illuminated by ultraviolet light. The invention also includes the composition comprising the first and second marking fluids.
    Type: Grant
    Filed: May 28, 1993
    Date of Patent: June 6, 1995
    Assignee: Nocopi Technologies, Inc.
    Inventors: Arshavir Gundjian, Abraham Kuruvilla
  • Patent number: RE36306
    Abstract: A method for protecting against duplication of a document with a color copier comprises providing a background color on a document having an average reflectance value and printing on the background with a contrast color having a spectral characteristic which modulates the average reflectance value by no more than 5% and has an average value equal to the average reflectance value. The contrast color is printed with a printing medium that allows activation by a rub and reveal action or by application of intense light.
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: September 14, 1999
    Assignee: Nocopi Technologies, Inc.
    Inventor: Arshavir Gundjian