Patents by Inventor Dariusz Wlodzimierz Kawka
Dariusz Wlodzimierz Kawka 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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Publication number: 20240051261Abstract: A composite sheet comprises a textile component having a first surface and a second surface and a first polymeric coating on the first surface of the textile component wherein the textile component further comprises a first structure of at least one woven fabric of continuous filament yarns, the fabric having an areal weight of from about 70 to about 508 gsm, a second structure of a nonwoven fabric comprising a blend of discontinuous fibers of oxidized polyacrylonitrile fibers and silica fibers wherein the oxidized polyacrylonitrile fibers are present in an amount of from about 30 to about 70 weight percent of the combined weight of the oxidized polyacrylonitrile fibers and silica fibers, a third structure of at least one woven fabric of continuous filament yarns the fabric having an areal weight of from about 70 to about 508 gsm and, optionally, wherein the nonwoven fabric of the second structure is mechanically attached to at least one of the other fabric structures by an attachment means.Type: ApplicationFiled: August 9, 2022Publication date: February 15, 2024Applicant: DUPONT SAFETY & CONSTRUCTION, INC.Inventor: Dariusz Wlodzimierz Kawka
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Publication number: 20220290375Abstract: A sheet comprises a nonwoven filamentary substrate and an inorganic refractory layer in contact with at least one surface of the substrate wherein (i) the substrate comprises from 40 to 80 weight percent of uniformly distributed mica and from 20 to 60 weight percent aramid material, the aramid material being in the form of aramid floc or pulp, a combination thereof and polymeric binder and (ii) the refractory layer comprises from 85 to 99 weight percent of platelets and from 1 to 15 weight percent of an adhesion promoter. The sheet is an electrically insulating flame and thermal barrier.Type: ApplicationFiled: March 9, 2021Publication date: September 15, 2022Inventors: BYOUNG SAM KANG, DARIUSZ WLODZIMIERZ KAWKA, CHRIS DEMBROSKY
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Patent number: 10457013Abstract: This invention is directed to a non-rigid composite sheet comprising in order (i) a first component having an areal weight of from 88 to 678 gsm comprising a first fabric of filamentary yarns having a tenacity of at least 11 g/dtex and a UV and weather impervious first polymeric layer. (ii) a second component having an areal weight of from 120 to 430 gsm comprising a flame resistant paper and (iii) a third component having an areal weight of from 88 to 678 gsm comprising a second fabric of filamentary yarns having a tenacity of at least 11 g/dtex and an impact and scratch resistant second polymeric layer, the second fabric of the third component being adjacent to the paper of the second component.Type: GrantFiled: May 27, 2014Date of Patent: October 29, 2019Assignee: DuPont Safety & Construction, Inc.Inventors: Dariusz Wlodzimierz Kawka, Tomas L. Perez
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Patent number: 10300677Abstract: A non-rigid composite sheet comprising in order (i) a first component comprising at least one first fabric of continuous filament yarns having a tenacity of at least 11 g/dtex and a first polymeric layer, (ii) a second component comprising at least one second fabric of continuous filament glass yarns, the at least one second fabric being adjacent to the at least one first fabric of the first component, and (iii) a third component comprising a second polymeric layer.Type: GrantFiled: March 9, 2018Date of Patent: May 28, 2019Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Dariusz Wlodzimierz Kawka
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Patent number: 10029439Abstract: A non-rigid composite sheet comprising in order (i) a first component comprising at least one first fabric of continuous filament yarns having a tenacity of at least 11 g/dtex and a first polymeric layer, (ii) a second component comprising at least one second fabric of continuous filament glass yarns, the at least one second fabric being adjacent to the at least one first fabric of the first component, and (iii) a third component comprising a second polymeric layer.Type: GrantFiled: March 18, 2016Date of Patent: July 24, 2018Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Dariusz Wlodzimierz Kawka
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Publication number: 20180194104Abstract: A non-rigid composite sheet comprising in order (i) a first component comprising at least one first fabric of continuous filament yarns having a tenacity of at least 11 g/dtex and a first polymeric layer, (ii) a second component comprising at least one second fabric of continuous filament glass yarns, the at least one second fabric being adjacent to the at least one first fabric of the first component, and (iii) a third component comprising a second polymeric layer.Type: ApplicationFiled: March 9, 2018Publication date: July 12, 2018Inventor: DARIUSZ WLODZIMIERZ KAWKA
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Patent number: 9993989Abstract: A non-rigid composite sheet comprising in order (i) a first component comprising a first fabric of continuous filament yarns having a tenacity of at least 11 g/dtex and a first polymeric layer, (ii) a second component comprising at least one second fabric of continuous filament glass yarns, the second fabric being adjacent to the first fabric of the first component, and (iii) a third component comprising a second polymeric layer.Type: GrantFiled: July 23, 2015Date of Patent: June 12, 2018Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Dariusz Wlodzimierz Kawka
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Publication number: 20180155876Abstract: A method of making a fiber-reinforced composite structure comprising the steps of (i) forming a paper sheet having a Gurley air resistance at least 200 seconds per 100 milliliters, the sheet comprising from 30 to 70 weight percent p-aramid fiber, (ii) depositing on both surfaces of the paper sheet a compression enhancing layer in a quantity up to 5 weight percent based on the weight of the paper, (iii) forming a honeycomb from the sheet of step (ii), and (iv) applying a matrix resin coating to the honeycomb of step (iii).Type: ApplicationFiled: January 29, 2018Publication date: June 7, 2018Inventors: MIKHAIL R. LEVIT, DARIUSZ WLODZIMIERZ KAWKA
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Patent number: 9976258Abstract: A method of making a fiber-reinforced composite structure comprises the steps of (i) forming a paper sheet having a Gurley air resistance at least 200 seconds per 100 milliliters, the sheet comprising from 30 to 70 weight percent p-aramid fiber, (ii) depositing on both surfaces of the paper sheet a compression enhancing layer in a quantity up to 5 weight percent based on the weight of the paper, (iii) forming a honeycomb from the sheet of step (ii), and (iv) applying a matrix resin coating to the honeycomb of step (iii).Type: GrantFiled: August 5, 2015Date of Patent: May 22, 2018Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Mikhail R Levit, Dariusz Wlodzimierz Kawka
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Publication number: 20170217120Abstract: A multilayer laminate comprising in order, a polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, an adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C. and an inorganic refractory layer wherein the refractory layer comprises platelets in an amount at least 85% by weight with a dry areal weight of 15 to 50 gsm and has a residual moisture content of no greater than 10 percent by weight.Type: ApplicationFiled: April 20, 2017Publication date: August 3, 2017Inventors: LLEWELLYN BENTLEY RICHARDSON, III, DARIUSZ WLODZIMIERZ KAWKA
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Patent number: 9643711Abstract: A multilayer laminate for use as a flame barrier in an aircraft comprising (i) a polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, (ii) an adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C., (iii) an inorganic refractory layer, and (iv) aramid paper comprising from 50 to 90 weight percent of aramid fibers and from 10 to 50 weight percent of meta-aramid binder wherein the inorganic refractory layer of (iii) comprises platelets in an amount of at least 85% by weight with a dry areal weight of 15 to 50 gsm and a residual moisture content of no greater than 10 percent by weight.Type: GrantFiled: May 6, 2015Date of Patent: May 9, 2017Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Llewellyn Bentley Richardson, III, Dariusz Wlodzimierz Kawka
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Publication number: 20160332417Abstract: A non-rigid composite sheet comprising in order (i) a first component comprising at least one first fabric of continuous filament yarns having a tenacity of at least 11 g/dtex and a first polymeric layer, (ii) a second component comprising at least one second fabric of continuous filament glass yarns, the at least one second fabric being adjacent to the at least one first fabric of the first component, and (iii) a third component comprising a second polymeric layer.Type: ApplicationFiled: March 18, 2016Publication date: November 17, 2016Applicant: E I DU PONT DE NEMOURS AND COMPANYInventor: DARIUSZ WLODZIMIERZ KAWKA
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Patent number: 9441326Abstract: This invention pertains to a layered sheet comprising a flame resistant wet-laid nonwoven paper having a first and second surface and an inorganic refractory layer adjacent to at least one surface of the paper wherein the refractory layer has a dry areal weight of from 15 to 50 gsm and the bond strength between the refractory layer and the surface of the paper is from 0.25 lb/in to 0.8 lb/in, wherein the carrier comprises from 40 to 70 weight percent of aramid fibers and from 30 to 60 weight percent of polymeric binder, is hydrophilic, has a smoothness on at least one surface of no greater than 150 Sheffield units, a thickness of from 0.025 to 0.175 mm and a density of from 0.60 to 1.1 g/cc.Type: GrantFiled: April 17, 2013Date of Patent: September 13, 2016Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Dariusz Wlodzimierz Kawka
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Patent number: 9434142Abstract: A method of making a composite sandwich panel comprises the steps of (i) making a core structure, (ii) making at least one facesheet, (iii) bonding at least one of the at least one facesheets to the core structure, wherein the growth of a carbon nanotube structure is achieved during at least one of steps (i) to (iii).Type: GrantFiled: January 25, 2013Date of Patent: September 6, 2016Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Mikhail R Levit, Llewellyn Bentley Richardson, III, Warren Francis Knoff, Dariusz Wlodzimierz Kawka
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Patent number: 9428864Abstract: This invention pertains to a layered sheet comprising an inherently flame resistant high strength fiber wet-laid nonwoven carrier having a first and second surface and an inorganic refractory layer adjacent to at least one surface of the carrier wherein the refractory layer has a dry area weight of from 15 to 50 gsm and the bond strength between the refractory layer and the surface of the paper is at least 0.25 lb/in, preferably at least 0.8 lb/in, wherein the carrier comprises from 70 to 90 weight percent of aramid fibers and from 10 to 30 weight percent of polymeric binder, is hydrophilic, has a thickness of from 0.025 to 0.175 mm and a density of from 0.25 to 1.1 g/cc.Type: GrantFiled: April 17, 2013Date of Patent: August 30, 2016Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Dariusz Wlodzimierz Kawka
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Patent number: 9316342Abstract: This invention pertains to a layered sheet comprising a flame resistant wet-laid nonwoven carrier having a first and second surface and an inorganic refractory layer adjacent to at least one surface of the carrier wherein the refractory layer has a dry area weight of from 15 to 50 gsm, the bond strength between the refractory layer and the surface of the carrier is at least 0.25 lb/in, wherein the carrier comprises from 40 to 70 weight percent of aramid fibers and from 30 to 60 weight percent of polymeric binder, is hydrophilic, has a smoothness on at least one surface of no less than 250 Sheffield units, a thickness of from 0.025 to 0.175 mm and a density of from 0.25 to 0.60 g/cc. Preferably the carrier is in the form of a paper.Type: GrantFiled: April 17, 2013Date of Patent: April 19, 2016Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Dariusz Wlodzimierz Kawka
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Publication number: 20160101604Abstract: A multilayer laminate comprising a first polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, a first adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C., an inorganic refractory layer comprising platelets in an amount of at least 85% by weight with a dry areal weight of 15 to 50 gsm and having a residual moisture content of no greater than 10 percent by weight, a second adhesive layer having an areal weight of from 4 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C. and a second polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 minutes.Type: ApplicationFiled: December 17, 2015Publication date: April 14, 2016Inventors: Llewellyn Bentley Richardson, III, Dariusz Wlodzimierz Kawka
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Publication number: 20160097162Abstract: This invention pertains to a method of making a fiber-reinforced composite structure comprising the steps of (i) forming a paper sheet having a Gurley air resistance at least 200 seconds per 100 milliliters, the sheet comprising from 30 to 70 weight percent p-aramid fiber, (ii) depositing on both surfaces of the paper sheet a compression enhancing layer in a quantity up to 5 weight percent based on the weight of the paper, (iii) forming a honeycomb from the sheet of step (ii), and (iv) applying a matrix resin coating to the honeycomb of step (iii).Type: ApplicationFiled: August 5, 2015Publication date: April 7, 2016Inventors: MIKHAIL R. LEVIT, DARIUSZ WLODZIMIERZ KAWKA
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Patent number: 9302845Abstract: This invention is directed to a non-rigid composite sheet comprising in order a first component having an areal density of from 102 to 678 gsm comprising a first fabric of filamentary yarns having a tenacity of at least 11 g/dtex and a UV and weather impervious first polymeric layer, a second component having an areal density of from 10 to 170 gsm comprising a flame resistant inorganic refractory layer adjacent to at least one protective polymeric layers, and a third component having an areal density of from 102 to 678 gsm comprising a second fabric of filamentary yarns having a tenacity of at least 11 g/dtex and an impact and scratch resistant second polymeric layer, the second fabric of the third component being adjacent to the refractory layer of the second component.Type: GrantFiled: January 22, 2014Date of Patent: April 5, 2016Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Dariusz Wlodzimierz Kawka, Karl K. Chang
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Patent number: 9296555Abstract: This invention is directed to a non-rigid composite sheet comprising in order (i) a first component having an areal density of from 88 to 678 gsm comprising a first fabric of filamentary yarns having a tenacity of at least 11 g/dtex and a UV and weather impervious first polymeric layer. (ii) a second component having an areal density of from 30 to 237 gsm comprising a flame resistant substrate and an inorganic refractory layer and (iii) a third component having an areal density of from 88 to 678 gsm comprising a second fabric of filamentary yarns having a tenacity of at least 11 g/dtex and an impact and scratch resistant second polymeric layer, the second fabric of the third component being adjacent to the refractory layer of the second component.Type: GrantFiled: November 5, 2013Date of Patent: March 29, 2016Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Dariusz Wlodzimierz Kawka, Karl K. Chang