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).

  • Publication number: 20130196175
    Abstract: 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: Application
    Filed: January 25, 2013
    Publication date: August 1, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Mikhail R. LEVIT, Llewellyn Bentley RICHARDSON, III, Warren Francis KNOFF, Dariusz Wlodzimierz KAWKA
  • Publication number: 20130156984
    Abstract: This invention is directed to a multilayered sheet comprising a release paper and an inorganic refractory layer coated onto one surface of the release paper wherein the refractory layer has a dry areal weight of from 15 to 50 gsm and a residual moisture content of no greater than 10 percent by weight. The paper comprises a blend of cellulose and cotton fibers and is hydrophilic.
    Type: Application
    Filed: December 3, 2012
    Publication date: June 20, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventor: Dariusz Wlodzimierz Kawka
  • Patent number: 8367988
    Abstract: A field director assembly includes electrically conductive vanes positioned with respect to each other and to a planar support member to prevent overheating of the susceptor in an unloaded microwave oven.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: February 5, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Nicole L. Blankenbeckler, William R. Corcoran, Jr., Dariusz Wlodzimierz Kawka
  • Publication number: 20120321848
    Abstract: 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.
    Type: Application
    Filed: December 14, 2011
    Publication date: December 20, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Llewellyn Bentley Richardson III, Dariusz Wlodzimierz Kawka
  • Publication number: 20120321849
    Abstract: 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, 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 min, wherein at least one of the first or second polymeric film layers is thermoplastic.
    Type: Application
    Filed: December 14, 2011
    Publication date: December 20, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Llewellyn Bentley Richardson, III, Dariusz Wlodzimierz Kawka
  • Publication number: 20120321883
    Abstract: A multilayer laminate for use as a flame barrier in an aircraft comprising a polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, an adhesive layer, an inorganic refractory layer and an aramid paper comprising from 50 to 90 weight percent of aramid fibers and from 10 to 50 weight percent of meta-aramid binder.
    Type: Application
    Filed: December 14, 2011
    Publication date: December 20, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Llewellyn Bentley Richardson, III, Dariusz Wlodzimierz Kawka
  • Publication number: 20110281080
    Abstract: This invention relates to a folded core structure made from paper comprising 20-85 weight percent of carbon fiber floc. The carbon fibers have a non-circular cross sectional aspect ratio of at least 1.5:1. The paper has a fiber volume fraction of at least 35%. The arithmetic mean length of the carbon fibers is at least 0.5 mm. and length weighted mean length at least 0.9 mm.
    Type: Application
    Filed: November 12, 2010
    Publication date: November 17, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Mikhail R. Levit, Dariusz Wlodzimierz Kawka
  • Publication number: 20110281063
    Abstract: This invention relates to a honeycomb core made from paper comprising 20-85 weight percent of carbon fiber floc. The carbon fibers have a non-round cross sectional aspect ratio of at least 1.5:1. The paper has a fiber volume fraction of at least 35%. The arithmetic mean length of the carbon fibers is at least 0.5 mm. and a length weighted mean length of at least 0.9 mm.
    Type: Application
    Filed: November 12, 2010
    Publication date: November 17, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Mikhail R. Levit, Dariusz Wlodzimierz Kawka
  • Publication number: 20110033686
    Abstract: A laminate useful as an allergen barrier structure, and process for making said laminate, comprising in order, a woven fabric layer having a thread count of 180 to 400; a nonwoven allergen barrier layer having a basis weight of from 6 to 10 g/m2 and consisting of fibers having average diameter of from 100 to 450 nanometers; and a tricot knit fabric layer; wherein the layers are attached by at least one adhesive distributed in discrete areas on the allergen barrier layer and penetrating into at least 70% of the thickness of that layer and also penetrating into but not through the woven and knit fabric layers. The laminate has a total basis weight of from 50 to 300 g/m2 and a filtration efficiency after 35 washings of 95 percent or greater for a 1 micrometer particle challenge of up to 1.6 liters per minute airflow.
    Type: Application
    Filed: August 10, 2009
    Publication date: February 10, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: DARIUSZ WLODZIMIERZ KAWKA
  • Publication number: 20080146108
    Abstract: This invention relates to a coated fabric and a method of making the same, and laminates and articles comprising the coated fabric. The fabric comprises a woven substrate having fiber volume fraction of at least 70 percent and non-meltable, rigid rod, high strength filaments having angular cross sections created by densifying the woven substrate. The coated fabrics and laminates are especially useful in rigid armor applications.
    Type: Application
    Filed: December 18, 2006
    Publication date: June 19, 2008
    Inventors: James Neal Singletary, Dariusz Wlodzimierz Kawka, James Carson Swann
  • Publication number: 20080120783
    Abstract: An allergen-barrier fabric comprising at least one porous layer of polymeric nanofibers, a fabric layer superjacent and adhered to the nanofiber layer, and optionally a fabric layer subjacent and adhered to the nanofiber layer, wherein the superjacent and optional subjacent fabric layers are adhered to said nanofiber layer such that the allergen-barrier fabric has a mean flow pore size of between about 0.01 ?m and about 10 ?m, and a Frazier air permeability of at least about 1.5 m3/min/m2.
    Type: Application
    Filed: August 17, 2006
    Publication date: May 29, 2008
    Inventors: Warren Francis Knoff, Dariusz Wlodzimierz Kawka
  • Patent number: 7335276
    Abstract: A method of forming a laminate of at least two layers including at least one aramid paper with at least one layer of polymer by calendering opposing surfaces of the aramid paper at different temperatures prior to laminate formation.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: February 26, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Dariusz Wlodzimierz Kawka, David Wayne Anderson, Michael Joseph Brown
  • Patent number: 7335275
    Abstract: A laminate of inorganic sheet and polyester resin having an overall thickness of 5 to 25 mils and having an elongation at break in both the cross direction and machine direction of at least 25%.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: February 26, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David Wayne Anderson, Dariusz Wlodzimierz Kawka
  • Patent number: 6855404
    Abstract: A laminate of inorganic sheet and polyester resin having an overall thickness of 5 to 25 mils and having an elongation at break in both the cross direction and machine direction of at least 25%.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: February 15, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David Wayne Anderson, Dariusz Wlodzimierz Kawka
  • Publication number: 20040180228
    Abstract: A laminate of inorganic sheet and polyester resin having an overall thickness of 5 to 25 mils and having an elongation at break in both the cross direction and machine direction of at least 25%.
    Type: Application
    Filed: March 13, 2003
    Publication date: September 16, 2004
    Inventors: David Wayne Anderson, Dariusz Wlodzimierz Kawka
  • Publication number: 20040072000
    Abstract: A laminate of aramid nonwoven sheet and polyester resin having an overall thickness of 5 to 25 mils (0.13 to 6.4 mm) and having an elongation at break of at least 40% in both the cross and machine direction and an average tear load in excess of 1.5 pounds-force (6.7 newtons) in both the cross and machine directions.
    Type: Application
    Filed: June 10, 2003
    Publication date: April 15, 2004
    Inventors: Dariusz Wlodzimierz Kawka, David Wayne Anderson
  • Publication number: 20040071952
    Abstract: A laminate of aramid nonwoven sheet and polyester resin having an overall thickness of 5 to 20 mils and having an elongation at break of at least 40% in both the cross and machine direction and an average tear load in excess of 1.5 pounds force per inch in both the cross and machine directions.
    Type: Application
    Filed: October 1, 2002
    Publication date: April 15, 2004
    Inventors: David Wayne Anderson, Dariusz Wlodzimierz Kawka
  • Publication number: 20040060655
    Abstract: A method of forming a laminate of at least two layers including at least one aramid paper with at least one layer of polymer by calendering opposing surfaces of the aramid paper at different temperatures prior to laminate formation.
    Type: Application
    Filed: October 1, 2002
    Publication date: April 1, 2004
    Inventors: Dariusz Wlodzimierz Kawka, David Wayne Anderson, Michael Joseph Brown