Patents by Inventor John Thomas Hofmann

John Thomas Hofmann 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: 20230098457
    Abstract: The present invention relates to the combination of certain flame retardant additives in a copolyester to improve the flame retardant properties of the copolyester composition while retaining clarity and impact properties, methods of making the copolyester composition and articles made from the copolyester composition. More specifically, the present invention relates to the use of brominated flame retardant compounds in copolyester compositions to improve the flame retardant properties while surprisingly retaining clarity, glass transition temperature, and impact properties.
    Type: Application
    Filed: February 10, 2021
    Publication date: March 30, 2023
    Applicant: Eastman Chemical Company
    Inventors: Robert Erik Young, John Thomas Hofmann
  • Publication number: 20220186021
    Abstract: Described are polymer compositions that include a blend of recycled poly(ethylene terephthalate) (rPET) and a copolyester based on monomers that include on terephthalic acid (TPA), ethylene glycol (EG) and 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD), wherein the blend has improved engineering properties compared to the rPET material.
    Type: Application
    Filed: May 6, 2020
    Publication date: June 16, 2022
    Applicant: Eastman Chemical Company
    Inventors: Katherine Augusta Hofmann, John Thomas Hofmann, Douglas Weldon Carico
  • Patent number: 10556388
    Abstract: The present invention is generally directed to prepreg composites, typically in the form of unidirectional tapes, which contain at least one reinforcing fiber and a thermoplastic polyester matrix. The prepreg composites can be thermally bonded to a wood-containing material in order to improve the structural performance of the material without requiring adhesives. The prepreg composite of the present invention can be applied to a wide range of wood substrates, including various hardwoods, softwoods, and engineered wood composites.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: February 11, 2020
    Assignee: Eastman Chemical Company
    Inventors: Mark Allan Treece, John Thomas Hofmann, Kendrick Casey Halsey
  • Publication number: 20180171631
    Abstract: The present invention is generally directed to prepreg composites, typically in the form of unidirectional tapes, which contain at least one reinforcing fiber and a thermoplastic polyester matrix. The prepreg composites can be thermally bonded to a mineral-containing substrate in order to improve the performance characteristics of the substrate without requiring adhesives and without significantly increasing the mass or thickness of the substrate. The prepreg composite of the present invention can be applied to a wide range of mineral-containing substrates, including structural panels, gypsum wallboards, plasterboard, drywall, cement boards, or ceiling tiles.
    Type: Application
    Filed: December 21, 2016
    Publication date: June 21, 2018
    Applicant: Eastman Chemical Company
    Inventors: Jeremy Hager Klug, Mark Allan Treece, Kaitlyn Elizabeth Ailey, Kendrick Casey Halsey, John Thomas Hofmann
  • Publication number: 20160311156
    Abstract: The present invention is generally directed to prepreg composites, typically in the form of unidirectional tapes, which contain at least one reinforcing fiber and a thermoplastic polyester matrix. The prepreg composites can be thermally bonded to a wood-containing material in order to improve the structural performance of the material without requiring adhesives. The prepreg composite of the present invention can be applied to a wide range of wood substrates, including various hardwoods, softwoods, and engineered wood composites.
    Type: Application
    Filed: April 22, 2015
    Publication date: October 27, 2016
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Mark Allan Treece, John Thomas Hofmann, Kendrick Casey Halsey