Patents Assigned to Nocopi Technologies, Inc.
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Patent number: 10920081Abstract: A leuco dye pastel marking device for use with a substrate treated with an activator of the leuco dye, such that drawing upon the substrate will reveal a color, but drawing on a normal surface will have no visible effect. A solvent such as dimethyl adipate is used to store the leuco dye in a longer-lived, more stable, solid form, and varying hardnesses and consistencies may be achieved by the addition of 12 hydroxystearic acid and ethyl cellulose. The substrate may be treated selectively with the activator such that a texture, image, or hidden message is revealed by the application of the leuco dye pastel to the substrate. One or more substrates and one or more leuco dye pastel marking devices may be presented to a child as a coloring book with pastels that only visibly mark the coloring book and no other surface.Type: GrantFiled: February 7, 2020Date of Patent: February 16, 2021Assignee: Nocopi Technologies, Inc.Inventors: Terry W. Stovold, JoAnn Domanski
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Publication number: 20200180333Abstract: A leuco dye pastel marking device for use with a substrate treated with an activator of the leuco dye, such that drawing upon the substrate will reveal a color, but drawing on a normal surface will have no visible effect. A solvent such as dimethyl adipate is used to store the leuco dye in a longer-lived, more stable, solid form, and varying hardnesses and consistencies may be achieved by the addition of 12 hydroxystearic acid and ethyl cellulose. The substrate may be treated selectively with the activator such that a texture, image, or hidden message is revealed by the application of the leuco dye pastel to the substrate. One or more substrates and one or more leuco dye pastel marking devices may be presented to a child as a coloring book with pastels that only visibly mark the coloring book and no other surface.Type: ApplicationFiled: February 7, 2020Publication date: June 11, 2020Applicant: Nocopi Technologies, Inc.Inventors: Terry W. Stovold, JoAnn Domanski
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Patent number: 10597537Abstract: A leuco dye pastel marking device for use with a substrate treated with an activator of the leuco dye, such that drawing upon the substrate will reveal a color, but drawing on a normal surface will have no visible effect. A solvent such as dimethyl adipate is used to store the leuco dye in a longer-lived, more stable, solid form, and varying hardnesses and consistencies may be achieved by the addition of 12 hydroxystearic acid and ethyl cellulose. The substrate may be treated selectively with the activator such that a texture, image, or hidden message is revealed by the application of the leuco dye pastel to the substrate. One or more substrates and one or more leuco dye pastel marking devices may be presented to a child as a coloring book with pastels that only visibly mark the coloring book and no other surface.Type: GrantFiled: April 13, 2018Date of Patent: March 24, 2020Assignee: Nocopi Technologies, Inc.Inventors: Terry W. Stovold, JoAnn Domanski
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Publication number: 20190315967Abstract: A leuco dye pastel marking device for use with a substrate treated with an activator of the leuco dye, such that drawing upon the substrate will reveal a color, but drawing on a normal surface will have no visible effect. A solvent such as dimethyl adipate is used to store the leuco dye in a longer-lived, more stable, solid form, and varying hardnesses and consistencies may be achieved by the addition of 12 hydroxystearic acid and ethyl cellulose. The substrate may be treated selectively with the activator such that a texture, image, or hidden message is revealed by the application of the leuco dye pastel to the substrate. One or more substrates and one or more leuco dye pastel marking devices may be presented to a child as a coloring book with pastels that only visibly mark the coloring book and no other surface.Type: ApplicationFiled: April 13, 2018Publication date: October 17, 2019Applicant: Nocopi Technologies, Inc.Inventors: Terry W. Stovold, JoAnn Domanski
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Patent number: 8822374Abstract: 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: GrantFiled: January 6, 2012Date of Patent: September 2, 2014Assignee: Nocopi Technologies, Inc.Inventors: Terry W. Stovold, JoAnn Domanski
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Publication number: 20130178362Abstract: 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: ApplicationFiled: January 6, 2012Publication date: July 11, 2013Applicant: NOCOPI TECHNOLOGIES, INC.Inventors: Terry W. Stovold, JoAnn Domanski
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Patent number: 8053494Abstract: 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: GrantFiled: January 10, 2008Date of Patent: November 8, 2011Assignee: Nocopi Technologies, Inc.Inventors: Terry W. Stovold, JoAnn Domanski
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Publication number: 20100059984Abstract: 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: ApplicationFiled: September 8, 2008Publication date: March 11, 2010Applicant: NOCOPI TECHNOLOGIES, INC.Inventors: JoAnn Domanski, Richard J. Selah
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Publication number: 20080113862Abstract: 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: ApplicationFiled: January 10, 2008Publication date: May 15, 2008Applicant: Nocopi Technologies, Inc.Inventors: Terry Stovold, JoAnn Domanski
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Patent number: 6140267Abstract: 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: GrantFiled: May 24, 1999Date of Patent: October 31, 2000Assignee: Nocopi Technologies, Inc.Inventor: Arshavir Gundjian
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Patent number: 6114281Abstract: 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: GrantFiled: January 27, 1998Date of Patent: September 5, 2000Assignee: Nocopi Technologies, Inc.Inventors: Blake Quenten Belding, JoAnn Silknitter, Kevin Bruce Stevenson, Terry William Stovold
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Patent number: 6106110Abstract: 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: GrantFiled: October 9, 1996Date of Patent: August 22, 2000Assignee: Nocopi Technologies, Inc.Inventors: Arshavir Gundjian, Warren Solodar
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Patent number: 6086966Abstract: 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: GrantFiled: March 1, 1999Date of Patent: July 11, 2000Assignee: Nocopi Technologies, Inc.Inventors: Arshavir Gundjian, Abraham Kuruvilla
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Patent number: 6013601Abstract: 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: GrantFiled: September 12, 1997Date of Patent: January 11, 2000Assignee: Nocopi Technologies, Inc.Inventor: Arshavir Gundjian
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Patent number: 5941572Abstract: 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: GrantFiled: September 12, 1997Date of Patent: August 24, 1999Assignee: Nocopi Technologies, Inc.Inventors: Arshavir Gundjian, Abraham Kuruvilla
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Patent number: 5786509Abstract: 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: GrantFiled: September 27, 1996Date of Patent: July 28, 1998Assignee: Nocopi Technologies, Inc.Inventors: Blake Quenten Belding, JoAnn Silknitter, Kevin Bruce Stevenson, Terry William Stovold
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Patent number: 5774160Abstract: 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: GrantFiled: March 31, 1997Date of Patent: June 30, 1998Assignee: Nocopi Technologies, Inc.Inventor: Arshavir Gundjian
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Patent number: 5750462Abstract: 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: GrantFiled: December 21, 1994Date of Patent: May 12, 1998Assignee: Nocopi Technologies, Inc.Inventor: Arshavir Gundjian
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Patent number: 5682193Abstract: 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: GrantFiled: May 23, 1996Date of Patent: October 28, 1997Assignee: Nocopi Technologies, Inc.Inventor: Arshavir Gundjian
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Patent number: RE36306Abstract: 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: GrantFiled: June 16, 1995Date of Patent: September 14, 1999Assignee: Nocopi Technologies, Inc.Inventor: Arshavir Gundjian