Patents by Inventor Paul T. Kohlmann
Paul T. Kohlmann 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).
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Patent number: 11787956Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: GrantFiled: September 12, 2022Date of Patent: October 17, 2023Assignee: VIAVI SOLUTIONS INC.Inventors: Vladimir P. Raksha, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Publication number: 20230002628Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: ApplicationFiled: September 12, 2022Publication date: January 5, 2023Applicant: VIAVI SOLUTIONS INC.Inventors: Vladimir P. RAKSHA, Paul T. KOHLMANN, Cornelis Jan DELST, Paul G. COOMBS
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Patent number: 11441041Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: GrantFiled: October 15, 2019Date of Patent: September 13, 2022Assignee: VIAVI SOLUTIONS INC.Inventors: Vladimir P. Raksha, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Publication number: 20220283341Abstract: In some implementations, a metamaterial absorber (MMA) is configured to absorb a particular range of electromagnetic radiation. The MMA includes a first metal or semiconductor material; a dielectric material disposed on the first metal or semiconductor material; and a second metal material disposed on the dielectric material. A length dimension associated with the MMA is less than or equal to 200 micrometers (?m), a width dimension associated with the MMA is less than or equal to 200 ?m, and a thickness dimension associated with the MMA is less than or equal to 8 ?m.Type: ApplicationFiled: February 23, 2022Publication date: September 8, 2022Inventors: Vladimir P. RAKSHA, Paul T. KOHLMANN
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Patent number: 11079525Abstract: A method of providing a configuration of a system of interference filters with a visible color shifting effect, includes: a hue matching step of identifying a configuration of a first interference filter including two first metal layers and a first spacer layer therebetween, and a configuration of a second interference filter including two second metal layers and a second spacer layer therebetween, wherein the first and second filters match in hue at the first viewing angle, and the mismatch in hue at the second angle; and a lightness adjustment step which may include modifying the layer material or the layer thickness of one of the metal layers; wherein a difference in lightness at the first viewing angle between the first and second modified filters is less that a difference in lightness at the first viewing angle between the first and second filters.Type: GrantFiled: August 27, 2018Date of Patent: August 3, 2021Assignee: VIAVI Solutions Inc.Inventors: Cornelis Jan Delst, Matthew R. Witzman, Paul T. Kohlmann, Charles T. Markantes
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Publication number: 20200115566Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: ApplicationFiled: October 15, 2019Publication date: April 16, 2020Applicant: VIAVI SOLUTIONS INC.Inventors: Vladimir P. RAKSHA, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Patent number: 10479901Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: GrantFiled: November 14, 2017Date of Patent: November 19, 2019Assignee: Viavi Solutions Inc.Inventors: Vladimir P. Raksha, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Patent number: 10300729Abstract: A color shifting security device has a Fabry-Perot type structure wherein a dielectric layer is disposed between a reflector and an absorbing layer. The absorber and reflector layers may be conforming and the dielectric layer therebetween is non-conforming, filling the regions in the micro structured adjacent absorbing or reflecting layer, at least one of which has a microstructure therein or thereon. By having the dielectric layer not conform to the microstructure it is next to, its thickness varies in cross section, which allows for different colors to be seen where the thickness varies.Type: GrantFiled: December 12, 2016Date of Patent: May 28, 2019Assignee: VIAVI Solutions Inc.Inventors: Paul T. Kohlmann, Alberto Argoitia, Cornelis Jan Delst
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Patent number: 10242788Abstract: The invention relates to anisotropic, reflective, magnetic flakes. In a liquid carrier and under influence of an external magnetic field, the flakes attract to one another side-by-side and form ribbons which provide higher reflectivity to a coating and may be used as a security feature for authentication of an object.Type: GrantFiled: May 22, 2017Date of Patent: March 26, 2019Assignee: VIAVI Solutions Inc.Inventors: Vladimir P. Raksha, Charles T. Markantes, Paul G. Coombs, Roger W. Phillips, Paul T. Kohlmann, Alberto Argoitia, Neil Teitelbaum
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Publication number: 20190011618Abstract: A method of providing a configuration of a system of interference filters with a visible color shifting effect, includes: a hue matching step of identifying a configuration of a first interference filter including two first metal layers and a first spacer layer therebetween, and a configuration of a second interference filter including two second metal layers and a second spacer layer therebetween, wherein the first and second filters match in hue at the first viewing angle, and the mismatch in hue at the second angle; and a lightness adjustment step which may include modifying the layer material or the layer thickness of one of the metal layers; wherein a difference in lightness at the first viewing angle between the first and second modified filters is less that a difference in lightness at the first viewing angle between the first and second filters.Type: ApplicationFiled: August 27, 2018Publication date: January 10, 2019Inventors: Cornelis Jan DELST, Matthew R. WITZMAN, Paul T. KOHLMANN, Charles T. MARKANTES
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Patent number: 10061065Abstract: A method of providing a configuration of a system of interference filters with a visible color shifting effect, includes: a hue matching step of identifying a configuration of a first interference filter including two first metal layers and a first spacer layer therebetween, and a configuration of a second interference filter including two second metal layers and a second spacer layer therebetween, wherein the first and second filters match in hue at the first viewing angle, and the mismatch in hue at the second angle; and a lightness adjustment step which may include modifying the layer material or the layer thickness of one of the metal layers; wherein a difference in lightness at the first viewing angle between the first and second modified filters is less that a difference in lightness at the first viewing angle between the first and second filters.Type: GrantFiled: November 18, 2014Date of Patent: August 28, 2018Assignee: VIAVI Solutions Inc.Inventors: Cornelis Jan Delst, Matthew R. Witzman, Paul T. Kohlmann, Charles T. Markantes
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Publication number: 20180066147Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: ApplicationFiled: November 14, 2017Publication date: March 8, 2018Applicant: VIAVI SOLUTIONS INC.Inventors: Vladimir P. RAKSHA, Paul T. KOHLMANN, Cornelis Jan DELST, Paul G. COOMBS
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Patent number: 9845398Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: GrantFiled: October 18, 2016Date of Patent: December 19, 2017Assignee: VIAVI SOLUTIONS INC.Inventors: Vladimir P. Raksha, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Publication number: 20170271067Abstract: The invention relates to anisotropic, reflective, magnetic flakes. In a liquid carrier and under influence of an external magnetic field, the flakes attract to one another side-by-side and form ribbons which provide higher reflectivity to a coating and may be used as a security feature for authentication of an object.Type: ApplicationFiled: May 22, 2017Publication date: September 21, 2017Inventors: Vladimir P. RAKSHA, Charles T. Markantes, Paul G. Coombs, Rogar W. Phillips, Paul T. Kohlmann, Alberto Argoitia, Neil Teitelbaum
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Patent number: 9662925Abstract: The invention relates to anisotropic, reflective, magnetic flakes. In a liquid carrier and under influence of an external magnetic field, the flakes attract to one another side-by-side and form ribbons which provide higher reflectivity to a coating and may be used as a security feature for authentication of an object.Type: GrantFiled: September 19, 2008Date of Patent: May 30, 2017Assignee: Viavi Solutions Inc.Inventors: Vladimir P. Raksha, Charles T. Markantes, Paul G. Coombs, Roger W. Phillips, Paul T. Kohlmann, Alberto Argoitia, Neil Teitelbaum
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Publication number: 20170087918Abstract: A color shifting security device has a Fabry-Perot type structure wherein a dielectric layer is disposed between a reflector and an absorbing layer. The absorber and reflector layers may be conforming and the dielectric layer therebetween is non-conforming, filling the regions in the micro structured adjacent absorbing or reflecting layer, at least one of which has a microstructure therein or thereon. By having the dielectric layer not conform to the microstructure it is next to, its thickness varies in cross section, which allows for different colors to be seen where the thickness varies.Type: ApplicationFiled: December 12, 2016Publication date: March 30, 2017Inventors: Paul T. Kohlmann, Alberto Argoitia, Cornelis Jan Delst
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Publication number: 20170037264Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: ApplicationFiled: October 18, 2016Publication date: February 9, 2017Applicant: VIAVI SOLUTIONS INCInventors: Vladimir P. RAKSHA, Paul T. KOHLMANN, Cornelis Jan DELST, Paul G. COOMBS
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Patent number: 9561682Abstract: A color shifting security device has a Fabry-Perot type structure wherein a dielectric layer is disposed between a reflector and an absorbing layer. The absorber and reflector layers may be conforming and the dielectric layer therebetween is non-conforming, filling the regions in the micro structured adjacent absorbing or reflecting layer, at least one of which has a microstructure therein or thereon. By having the dielectric layer not conform to the microstructure it is next to, its thickness varies in cross section, which allows for different colors to be seen where the thickness varies.Type: GrantFiled: June 22, 2012Date of Patent: February 7, 2017Assignee: Viavi Solutions Inc.Inventors: Paul T. Kohlmann, Alberto Argoitia, Cornelis Jan Delst
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Patent number: 9508475Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: GrantFiled: January 3, 2013Date of Patent: November 29, 2016Assignee: VIAVI SOLUTIONS INC.Inventors: Vladimir P. Raksha, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Publication number: 20150138641Abstract: A method of providing a configuration of a system of interference filters with a visible color shifting effect, includes: a hue matching step of identifying a configuration of a first interference filter including two first metal layers and a first spacer layer therebetween, and a configuration of a second interference filter including two second metal layers and a second spacer layer therebetween, wherein the first and second filters match in hue at the first viewing angle, and the mismatch in hue at the second angle; and a lightness adjustment step which may include modifying the layer material or the layer thickness of one of the metal layers; wherein a difference in lightness at the first viewing angle between the first and second modified filters is less that a difference in lightness at the first viewing angle between the first and second filters.Type: ApplicationFiled: November 18, 2014Publication date: May 21, 2015Inventors: Cornelis Jan Delst, Matthew R. WITZMAN, Paul T. KOHLMANN, Charles T. MARKANTES