Patents by Inventor David Joseph Koehl

David Joseph Koehl 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).

  • Antimicrobial organic preservatives
    Patent number: 11122800
    Abstract: The invention is a chemically and physically stable solution of levulinic acid, benzoic acid, and sorbic acids or their salts which is antimicrobially effective against bacteria and fungi. The solution provides improved antibacterial protection for personal care and cosmetic products at lower than expected levulinic acid levels and at desirable use levels. The composition may also include a solvent selected from the group of aromatic alcohols consisting of phenoxyethanol, phenylpropanol, phenylethanol, benzyl alcohol, and mixtures of these alcohols. These solvents extend the range of acidity over which the invention is capable of inhibiting bacterial and fungal growth.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 21, 2021
    Assignee: Troy Corporation
    Inventors: David Joseph Koehl, Brian Joseph Mullaney
  • ANTIMICROBIAL ORGANIC PRESERVATIVES
    Publication number: 20190124921
    Abstract: The invention is a chemically and physically stable solution of levulinic acid, benzoic acid, and sorbic acids or their salts which is antimicrobially effective against bacteria and fungi. The solution provides improved antibacterial protection for personal care and cosmetic products at lower than expected levulinic acid levels and at desirable use levels. The composition may also include a solvent selected from the group of aromatic alcohols consisting of phenoxyethanol, phenylpropanol, phenylethanol, benzyl alcohol, and mixtures of these alcohols. These solvents extend the range of acidity over which the invention is capable of inhibiting bacterial and fungal growth.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 2, 2019
    Inventors: David Joseph Koehl, Brian Joseph Mullaney
  • METHOD FOR IMPARTING ANTIBIOTIC ACTIVITY TO THE SURFACE OF A SOLID SUBSTRATE
    Publication number: 20110076387
    Abstract: The present invention relates to a method for imparting antibiotic activity to a surface of a solid substrate by exposing a solid substrate composition to conditions suitable for covalent grafting and thermal polymerization of the substrate.
    Type: Application
    Filed: September 29, 2009
    Publication date: March 31, 2011
    Applicant: LONZA, INC.
    Inventors: David Joseph Koehl, Joseph Kimler, Larry Kent Hall, Philip Gerdon Sweeny