Patents by Inventor Karl Rakos
Karl Rakos 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: 20220111624Abstract: A matt polymeric film, which may be a single layer or multi-layer film, comprising particles having a volume-weighted mean size (D(4,3)) of no more than 25 ?m. The particles may be present in an amount of from about 5% to about 35% by volume fraction of the film. The matt film is suitable for use as a printable film and/or as a release film in cast release applications.Type: ApplicationFiled: December 6, 2019Publication date: April 14, 2022Applicant: DuPont Teijin Films U.S. Limited PartnershipInventors: Katrina Thorburn, Dmytro Stratiychuk-Dear, Karl Rakos
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Patent number: 11028291Abstract: A coextruded biaxially oriented composite film comprising a polyester substrate layer and disposed on one or both surfaces thereof a strippable sacrificial layer, wherein said strippable sacrificial layer comprises an ethylene-methacrylic acid (EMAA) copolymer.Type: GrantFiled: September 12, 2018Date of Patent: June 8, 2021Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIPInventors: Robert Eveson, Karl Rakos, Damian Peter Tuffin, Dominic Hoy
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Publication number: 20190085216Abstract: A coextruded biaxially oriented composite film comprising a polyester substrate layer and disposed on one or both surfaces thereof a strippable sacrificial layer, wherein said strippable sacrificial layer comprises an ethylene-methacrylic acid (EMAA) copolymer.Type: ApplicationFiled: September 12, 2018Publication date: March 21, 2019Applicant: DuPont Teijin Films U.S. Limited PartnershipInventors: ROBERT EVESON, Karl RAKOS, Damian Peter TUFFIN, Dominic HOY
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Patent number: 10106706Abstract: A coextruded biaxially oriented composite film comprising a polyester substrate layer and disposed on one or both surfaces thereof a strippable sacrificial layer, wherein said strippable sacrificial layer comprises an ethylene-methacrylic acid (EMAA) copolymer.Type: GrantFiled: March 13, 2012Date of Patent: October 23, 2018Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIPInventors: Robert Eveson, Karl Rakos, Damian Peter Tuffin, Dominic Hoy
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Patent number: 9982999Abstract: An interferometric method for profiling the topography of a sample surface comprises: (i) a first interferometric profiling step at a first magnification M1 to produce a map comprising pixels with planar (X,Y)-coordinates corresponding to the area of the sample surface, (ii) identifying pixel(s) which meet or exceed a Cut-Off Threshold, and meet or exceed a parameter NNAP; (iii) identifying pixel(s) for which no z-coordinate has been recorded; (iv) generating a Low Magnification Frame File (LMFF) which comprises the (X,Y) coordinates of the pixels derived from steps (ii) and (iii); (v) a second interferometric profiling step at a second magnification M2, wherein M2>M1, wherein only selected regions of the sample surface are analysed, said selected regions comprising the features associated with the (X,Y)-coordinates of the pixels in the Low Magnification Frame File; and further comprising a step selected from: (vi) analysing the output of the second interferometric profiling step to differentiate between aType: GrantFiled: September 19, 2013Date of Patent: May 29, 2018Assignee: DuPont Teijin Films U.S. Limited PartnershipInventor: Karl Rakos
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Publication number: 20150241210Abstract: An interferometric method for profiling the topography of a sample surface comprises: (i) a first interferometric profiling step at a first magnification M1 to produce a map comprising pixels with planar (X,Y)-coordinates corresponding to the area of the sample surface, (ii) identifying pixel(s) which meet or exceed a Cut-Off Threshold, and meet or exceed a parameter NNAP; (iii) identifying pixel(s) for which no z-coordinate has been recorded; (iv) generating a Low Magnification Frame File (LMFF) which comprises the (X,Y) coordinates of the pixels derived from steps (ii) and (iii); (v) a second interferometric profiling step at a second magnification M2, wherein M2>M1, wherein only selected regions of the sample surface are analysed, said selected regions comprising the features associated with the (X,Y)-coordinates of the pixels in the Low Magnification Frame File; and further comprising a step selected from: (vi) analysing the output of the second interferometric profiling step to differentiate between aType: ApplicationFiled: September 19, 2013Publication date: August 27, 2015Applicant: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIPInventor: Karl RAKOS
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Publication number: 20140008026Abstract: A coextruded biaxially oriented composite film comprising a polyester substrate layer and disposed on one or both surfaces thereof a strippable sacrificial layer, wherein said strippable sacrificial layer comprises an ethylene-methacrylic acid (EMAA) copolymer.Type: ApplicationFiled: March 13, 2012Publication date: January 9, 2014Applicant: DuPont Teijin Films U.S. Limited PartnershipInventors: Robert Eveson, Karl Rakos, Damian Peter Tuffin, Dominic Hoy
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Patent number: 8501300Abstract: A method of manufacture of a coated polymeric film which comprises performing in sequence the steps of: (i) forming a substrate layer comprising poly(ethylene naphthalate) having a thickness in a range from 50 ?m to 250 ?m; (ii) stretching the substrate layer in at least one direction; (iii) heat-setting the substrate layer under dimensional restraint at a tension in the range of about 19 to about 75 kg/m of film width, at a temperature above the glass transition temperature of the poly(ethylene naphthalate) but below the melting temperature thereof; (iv) heat-stabilizing the substrate layer under a tension of less than 5 kg/m of film width, and at a temperature above the glass transition temperature of the poly(ethylene naphthalate) but below the melting temperature thereof; and (v) disposing a coating layer on a surface of the substrate layer by a process comprising applying a planarizing coating composition thereto such that a surface of said coating layer exhibits an Ra value of less than 0.Type: GrantFiled: December 17, 2009Date of Patent: August 6, 2013Assignee: DuPont Teijin Films U.S. Limited PartnershipInventors: Julian Neal Robinson, Robert William Eveson, Karl Rakos
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Patent number: 8318289Abstract: A composite film comprising a heat-stabilised, heat-set, oriented poly(ethylene naphthalate) substrate, and a coating layer having a surface; wherein said substrate exhibits one or more of: (i) a shrinkage at 30 mins at 230° C. of less than 1%; and/or (ii) a residual dimensional change ?Lr measured at 25° C. before and after heating the substrate from 8° C. to 200° C. and then cooling to 8° C., of less than 0.75% of the original dimension; and/or (iii) a coefficient of linear thermal expansion (CLTE) within the temperature range from ?40° C. to +100° C. of less than 40×10?6/° C.; and wherein the surface of said coating layer exhibits an Ra value of less than 0.6 nm, and/or an Rq value of less than 0.8 nm, the thickness of the substrate is between 50 and 250 ?m and wherein the number of surface peaks in the range 300 to 600 nm per 5 cm2 area (N(300-600)) of the film is less than 50.Type: GrantFiled: December 17, 2009Date of Patent: November 27, 2012Assignee: DuPont Teijin Films U.S. Limited PartnershipInventors: Julian Neal Robinson, Robert William Eveson, Karl Rakos
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Publication number: 20110209901Abstract: A method of improving the flexibility of a coated polyester substrate for an electronic device comprising a coated polyester substrate layer and an electrode layer comprising conductive material, said method comprising: (a) providing a polyester film; and (b) disposing an organic/inorganic hybrid coating on one or both surfaces of said polyester film, wherein said coating is derived from a coating composition comprising a low molecular weight reactive component selected from monomeric acrylates and/or an unsaturated oligomeric component selected from acrylates, polyether acrylates, epoxy acrylates and polyester acrylates; a solvent; and inorganic particles, and optionally further comprising a photoinitiator.Type: ApplicationFiled: August 1, 2008Publication date: September 1, 2011Applicant: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIPInventors: William A. MacDonald, Duncan Henry MacKerron, Robert W. Eveson, Karl Rakos
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Publication number: 20110081530Abstract: A method of manufacture of an anti-microbial polymeric film comprising coextruding a polymeric substrate layer comprising a first layer of a first polymeric material and a second layer of a second polymeric material wherein the crystalline melting temperature (TM2) of said second polymeric material is lower than the crystalline melting temperature (TM1) of the first polymeric material; stretching the coextruded substrate in a first direction; optionally stretching the substrate layer in a second, orthogonal direction; disposing on the surface of the polymeric second layer a composition comprising a particulate antimicrobial compound and a liquid vehicle, and preferably also a surfactant; and heat-setting the stretched film at a temperature above the crystalline melting temperature (TM2) of the second polymeric material but below the crystalline melting temperature (TM1) of the first polymeric material; wherein the composition is applied to the polymeric second layer after the coextrusion step but before the hType: ApplicationFiled: June 10, 2009Publication date: April 7, 2011Inventors: Julian Neal Robinson, Robert W. Eveson, Karl Rakos, David Brown, Jackie Symonds, Debbie A. Stephenson
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Publication number: 20100159198Abstract: The use of a coating composition comprising: (a) from about 5 to about 50 weight percent solids, the solids comprising from about 10 to about 70 weight percent silica and from about 90 to about 30 weight percent of a partially polymerized organic silanol of the general formula RSi(OH)3, wherein R is selected from methyl and up to about 40% of a group selected from the group consisting of vinyl, phenyl, gamma-glycidoxypropyl, and gamma-methacryloxypropyl, and (b) from about 95 to about 50 weight percent solvent, the solvent comprising from about to about 90 weight percent water and from about 90 to about 10 weight percent lower aliphatic alcohol, wherein the coating composition has a pH of from about 3.0 to about 8.0, for the purpose of improving the surface smoothness of a polymeric substrate, particularly a heat-stabilised, heat-set, oriented polyester substrate, and use of said coated substrate in the manufacture of an electronic or opto-electronic device containing a conjugated conductive polymer.Type: ApplicationFiled: December 17, 2009Publication date: June 24, 2010Applicant: DuPont Teijin Films U.S. Limited PartnershipInventors: Julian Neal Robinson, Robert William Eveson, Karl Rakos
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Publication number: 20100154886Abstract: The use of a coating composition comprising: (a) from about 5 to about 50 weight percent solids, the solids comprising from about 10 to about 70 weight percent silica and from about 90 to about 30 weight percent of a partially polymerized organic silanol of the general formula RSi(OH)3, wherein R is selected from methyl and up to about 40% of a group selected from the group consisting of vinyl, phenyl, gamma-glycidoxypropyl, and gamma-methacryloxypropyl, and (b) from about 95 to about 50 weight percent solvent, the solvent comprising from about 10 to about 90 weight percent water and from about 90 to about 10 weight percent lower aliphatic alcohol, wherein the coating composition has a pH of from about 3.0 to about 8.0, for the purpose of improving the surface smoothness of a polymeric substrate, particularly a heat-stabilised, heat-set, oriented polyester substrate, and use of said coated substrate in the manufacture of an electronic or opto-electronic device containing a conjugated conductive polymer.Type: ApplicationFiled: December 17, 2009Publication date: June 24, 2010Applicant: DuPont Teijin Films U.S. Limited PartnershipInventors: Julian Neal Robinson, Robert William Eveson, Karl Rakos
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Patent number: 7641957Abstract: The use of a coating composition comprising: (a) from about 5 to about 50 weight percent solids, the solids comprising from about 10 to about 70 weight percent silica and from about 90 to about 30 weight percent of a partially polymerized organic silanol of the general formula RSi(OH)3, wherein R is selected from methyl and up to about 40% of a group selected from the group consisting of vinyl, phenyl, gamma-glycidoxypropyl, and gamma-methacryloxypropyl, and (b) from about 95 to about 50 weight percent solvent, the solvent comprising from about 10 to about 90 weight percent water and from about 90 to about 10 weight percent lower aliphatic alcohol, wherein the coating composition has a pH of from about 3.0 to about 8.0, for the purpose of improving the surface smoothness of a polymeric substrate, particularly a heat-stabilised, heat-set, oriented polyester substrate, and use of said coated substrate in the manufacture of an electronic or optoelectronic device containing a conjugated conductive polymer.Type: GrantFiled: March 19, 2003Date of Patent: January 5, 2010Assignee: Dupont Teijin Films U.S. Limited PartnershipInventors: Julian Neal Robinson, Robert William Eveson, Karl Rakos
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Publication number: 20050238871Abstract: The use of a coating composition comprising: (a) from about 5 to about 50 weight percent solids, the solids comprising from about 10 to about 70 weight percent silica and from about 90 to about 30 weight percent of a partially polymerized organic silanol of the general formula RSi(OH)3, wherein R is selected from methyl and up to about 40% of a group selected from the group consisting of vinyl, phenyl, gamma-glycidoxypropyl, and gamma-methacryloxypropyl, and (b) from about 95 to about 50 weight percent solvent, the solvent comprising from about 10 to about 90 weight percent water and from about 90 to about 10 weight percent lower aliphatic alcohol, wherein the coating composition has a pH of from about 3.0 to about 8.0, for the purpose of improving the surface smoothness of a polymeric substrate, particularly a heat-stabilised, heat-set, oriented polyester substrate, and use of said coated substrate in the manufacture of an electronic or optoelectronic device containing a conjugated conductive polymer.Type: ApplicationFiled: March 19, 2003Publication date: October 27, 2005Inventors: Julian Robinson, Robert Eveson, Karl Rakos
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Patent number: 6468641Abstract: A composite film is described which consists of a primary unfilled polyester layer and a secondary polyester layer containing from 1 to 8% by weight, based on the weight of the secondary polyester layer, of finely divided silica particles having a volume weighted mean particle size diameter D[4,3] of from 2.3 to 6.2 micrometers. The composite film is used in backlit displays such as illuminated signboards and provides uniform light transmission while maintaining the same strength of illumination at all points over the area of the display.Type: GrantFiled: March 14, 2001Date of Patent: October 22, 2002Assignee: E. I. du Pont de Nemours & CompanyInventors: Karl Rakos, Paul David Alan Mills, Moira Logan, Noel Stephen Brabbs
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Publication number: 20010010859Abstract: A composite film is described which consists of a primary unfilled polyester layer and a secondary polyester layer containing from 1 to 8% by weight, based on the weight of the secondary polyester layer, of finely divided silica particles having a volume weighted mean particle size diameter D[4,3] of from 2.3 to 6.2 micrometers. The composite film is used in backlit displays such as illuminated signboards and provides uniform light transmission while maintaining the same strength of illumination at all points over the area of the display.Type: ApplicationFiled: March 14, 2001Publication date: August 2, 2001Inventors: Karl Rakos, Paul David Alan Mills, Moria Logan, Noel Stephen Brabbs
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Patent number: 6251505Abstract: A composite film is described which consists of a primary unfilled polyester layer and a secondary polyester layer containing from 1 to 8% by weight, based on the weight of the secondary polyester layer, of finely divided silica particles having a volume weighted mean particle size diameter D[4,3] of from 2.3 to 6.2 micrometers. The composite film is used in backlit displays such as illuminated signboards and provides uniform light transmission while maintaining the same strength of illumination at all points over the area of the display.Type: GrantFiled: April 1, 1999Date of Patent: June 26, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Karl Rakos, Paul David Alan Mills, Moira Logan, Noel Stephen Brabbs
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Patent number: 5626959Abstract: A polymeric film comprising from 0.0005% to 2% by weight, based upon the weight of the polymer in the film, of filler particles having a volume distributed median particle diameter of from 0.1 to 12.5 .mu.m, the filler particles being obtainable by calcining precursor silicone resin particles prior to incorporation into the film polymer.Type: GrantFiled: July 7, 1994Date of Patent: May 6, 1997Assignee: Imperial Chemical Industries PLCInventors: Paul D. A. Mills, Junaid A. Siddiqui, Karl Rakos
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Patent number: 5610222Abstract: A polymeric film comprising from 0.0005% to 2% by weight, based upon the weight of the polymer in the film, of filler particles having a volume distributed median particle diameter of from 0.1 to 12.5 .mu.m, the filler particles being obtainable by calcining precursor silicone resin particles prior to incorporation into the film polymer.Type: GrantFiled: September 27, 1994Date of Patent: March 11, 1997Assignee: Imperial Chemical Industries PLCInventors: Paul D. A. Mills, Junaid A. Siddiqui, Karl Rakos