Patents Assigned to Zoltek Corporation
  • Patent number: 12104024
    Abstract: A sized reinforcing filler, comprising a filler and a sizing agent disposed on at least a portion of the filler, to be used for reinforcement for plastics is disclosed. The sizing agent is based upon at least one of a polyvinyl alcohol, an ethylene/vinyl alcohol copolymer, a silane-grafted polyvinyl alcohol and a silane-grafted ethylene/vinyl alcohol copolymer, a silane-grafted polyvinyl alcohol and a silane-grafted ethylene/vinyl alcohol copolymer. The polyvinyl alcohol is useful as a size for all types of fibers and particles to reinforce all types of commodity and engineering plastics, particularly polyolefin resins, to form polymer composites. As such, polymer composites reinforced with such sized reinforcing fillers, as well as articles, components, and products including such polymers composites, are also disclosed.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: October 1, 2024
    Assignee: Zoltek Corporation
    Inventors: Philip F. Chu, Philip L. Schell, David M. Corbin, Shigeo Iwasawa
  • Patent number: 11834593
    Abstract: Disclosed herein is an electrically conductive adhesive composition, which including milled carbon fibers dispersed in a thermosetting resin and a curative agent. Also, disclosed herein are articles comprising at least two components adhesively bonded by the electrically conductive adhesive composition and methods of making such adhesives and articles.
    Type: Grant
    Filed: August 10, 2022
    Date of Patent: December 5, 2023
    Assignee: ZOLTEK CORPORATION
    Inventors: Steven Eric Baldini, David Michael Corbin
  • Patent number: 11566369
    Abstract: Disclosed herein is an electrically conductive sized fiber including a fiber and a sizing composition adhered to a surface of the fiber, wherein the sizing composition includes at least one sizing compound and a plurality of graphene oxide nanoparticles, The present disclosure also discloses fiber-reinforced resin composites, articles including fiber-reinforced resin composites and methods of making such electrically conductive sized fiber and articles therefrom.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: January 31, 2023
    Assignee: ZOLTEK CORPORATION
    Inventors: Steven Eric Baldini, David Michael Corbin
  • Publication number: 20220380637
    Abstract: Disclosed herein is an electrically conductive adhesive composition, which including milled carbon fibers dispersed in a thermosetting resin and a curative agent. Also, disclosed herein are articles comprising at least two components adhesively bonded by the electrically conductive adhesive composition and methods of making such adhesives and articles.
    Type: Application
    Filed: August 10, 2022
    Publication date: December 1, 2022
    Applicant: Zoltek Corporation
    Inventors: Steven Eric Baldini, David Michael Corbin
  • Patent number: 11447666
    Abstract: Disclosed herein is an electrically conductive adhesive composition, articles comprising at least two components adhesively bonded by the electrically conductive adhesive composition and methods of making such adhesives and articles. The electrically conductive adhesive composition includes milled carbon fibers dispersed in a thermosetting resin and a curative agent.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: September 20, 2022
    Assignee: ZOLTEK CORPORATION
    Inventors: Steven Eric Baldini, David Michael Corbin
  • Publication number: 20220281707
    Abstract: A fiber guide that guides fibers in a fiber processing system. The fiber guide has a surface having apertures through which fibers can pass in a direction from an upstream side of the surface to a downstream side of the surface. The apertures include at least one pair of apertures adjacent to and spaced from one another. The inlet of the first aperture is offset from the inlet of the second aperture. The offset is in the direction in which the fibers pass from the upstream side of the surface to the downstream side of the surface. A distance (d1) between the inlet of the first aperture and the inlet of the second aperture is larger than a distance (d2) between the first aperture and the second aperture measured transverse to the direction in which the fibers can pass.
    Type: Application
    Filed: August 6, 2020
    Publication date: September 8, 2022
    Applicant: Zoltek Corporation
    Inventors: Maurice GELI, Arpad RUMY
  • Publication number: 20210363313
    Abstract: A sized reinforcing filler, comprising a filler and a sizing agent disposed on at least a portion of the filler, to be used for reinforcement for plastics is disclosed. The sizing agent is based upon at least one of a polyvinyl alcohol, an ethylene/vinyl alcohol copolymer, a silane-grafted polyvinyl alcohol and a silane-grafted ethylene/vinyl alcohol copolymer, a silane-grafted polyvinyl alcohol and a silane-grafted ethylene/vinyl alcohol copolymer. The polyvinyl alcohol is useful as a size for all types of fibers and particles to reinforce all types of commodity and engineering plastics, particularly polyolefin resins, to form polymer composites. As such, polymer composites reinforced with such sized reinforcing fillers, as well as articles, components, and products including such polymers composites, are also disclosed.
    Type: Application
    Filed: July 18, 2018
    Publication date: November 25, 2021
    Applicant: Zoltek Corporation
    Inventors: Philip F. CHU, Philip L. SCHELL, David M. CORBIN, Shigeo IWASAWA
  • Publication number: 20210040679
    Abstract: Disclosed herein is an electrically conductive sized fiber including a fiber and a sizing composition adhered to a surface of the fiber, wherein the sizing composition includes at least one sizing compound and a plurality of graphene oxide nanoparticles, The present disclosure also discloses fiber-reinforced resin composites, articles including fiber-reinforced resin composites and methods of making such electrically conductive sized fiber and articles therefrom.
    Type: Application
    Filed: March 28, 2019
    Publication date: February 11, 2021
    Applicant: Zoltek Corporation
    Inventors: Steven Eric Baldini, David Michael Corbin
  • Publication number: 20210024784
    Abstract: Disclosed herein is an electrically conductive adhesive composition, articles comprising at least two components adhesively bonded by the electrically conductive adhesive composition and methods of making such adhesives and articles. The electrically conductive adhesive composition includes milled carbon fibers dispersed in a thermosetting resin and a curative agent.
    Type: Application
    Filed: March 28, 2019
    Publication date: January 28, 2021
    Applicant: Zoltek Corporation
    Inventors: Steven Eric Baldini, David Michael Corbin
  • Patent number: RE34162
    Abstract: A method of manufacturing controlled .Iadd.surface .Iaddend.electrical resistivity carbon fiber sheet products employing a carbonizable starting material, heating and drawing the starting material (if required), .Iadd.stabilizing and .Iaddend.oxidizing the starting material .Iadd.if required .Iaddend.at an elevated temperature of the order of 220 degrees Centigrade to effect molecular aromatic rearrangement of the starting material, .Iadd.partially .Iaddend.carbonizing the oxidized starting material at .[.an.]. elevated temperature .Iadd.values .Iaddend.in an oxygen free atmosphere within a furnace having an elevated temperature extending over a temperature range .Iadd.from about 370 degrees Centigrade .Iaddend. to about 1400 degrees Centigrade .[.by soaking the.]..Iadd.. The .Iaddend.starting material .Iadd.is soaked .Iaddend.at an elevated temperature for a predetermined period of time to provide a .Iadd.known .Iaddend.preselected .Iadd.surface .Iaddend.electrical resistivity to the .Iadd.partially .
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: January 19, 1993
    Assignee: Zoltek Corporation
    Inventor: George P. Boyd, Jr.