Patents by Inventor Lisa M. Hahn

Lisa M. Hahn 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).

  • Radiation-curable inks for flexographic and screen-printing applications from multifunctional acrylate oligomers
    Patent number: 7291658
    Abstract: The present invention relates generally to radiation-curable ink formulations, and particularly, but not by way of limitation, to a family of radiation-curable ink formulations specifically for flexographic and screen printing applications. The inventive ink formulations are based on multifunctional acrylate resins formed by the reaction of acrylate monomers and oligomers with ?-keto esters (e.g., acetoacetates), ?-diketones (e.g., 2,4-pentanedione), ?-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other ?-dicarbonyl compounds that can participate in Michael addition reactions.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: November 6, 2007
    Assignee: Ashland Licensing and Intellectual Property LLC
    Inventors: Sridevi Narayan-Sarathy, Lisa M. Hahn
  • Multifunctional acrylate oligomers as pigment grinding vehicles for radiation-curable ink applications
    Patent number: 7252709
    Abstract: The invention detailed herein comprises a family of multifunctional acrylate oligomers which are useful as pigment grinding vehicles for use in radiation-curable coating formulations. The multifunctional acrylate resins are formed by the reaction of acrylate monomers and oligomers with ?-keto esters (e.g., acetoacetates), ?-diketones (e.g., 2,4-pentanedione), ?-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other ?-dicarbonyl compounds or Michael “donors” that can participate in the Michael addition reaction. These resin vehicles have a built-in chromophore that enables ink formulations made from their dispersions to cure under standard UV-cure conditions with significantly less photoinitiator than commercial formulations. The resins also exhibit excellent pigment wetting characteristics and can be designed to function as a single dispersion vehicle for different pigments and different ink applications such as screen, flexographic, and lithographic printing.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: August 7, 2007
    Assignee: Ashland Licensing and Intellectual Property LLC
    Inventors: Sridevi Narayan-Sarathy, Lisa M. Hahn, Michael Gould
  • Radiation-curable lithographic inks from multifunctional acrylate oligomers
    Patent number: 7214725
    Abstract: The present invention relates generally to radiation-curable ink formulations, and particularly, but not by way of limitation, to a family of radiation-curable ink formulations specifically for lithographic printing applications. The inventive ink formulations are based on multifunctional acrylate resins formed by the reaction of acrylate monomers and oligomers with ?-keto esters (e.g., acetoacetates), ?-diketones (e.g., 2,4-pentanedione), ?-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other ?-dicarbonyl compounds that can participate in Michael addition reactions.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: May 8, 2007
    Assignee: Ashland Licensing and Intellectual Property LLC
    Inventors: Sridevi Narayan-Sarathy, Lisa M. Hahn
  • Paints and methods of making same
    Patent number: 6706107
    Abstract: A non-toxic paint and methods for making same are disclosed herein, such paint being comprised of a vehicle, a kaolin slurry and a pigment dispersion. Specifically, the vehicle is comprised of casein protein and potassium sorbate. Such paints are non-toxic and have a substantially long wet-shelf life.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: March 16, 2004
    Inventors: Whitney A. Walker, Richard K. Walker, Clark A. Higginbotham, IV, Lisa M. Hahn
  • Paints and methods of making same
    Publication number: 20020170463
    Abstract: A non-toxic paint and methods for making same are disclosed herein, such paint being comprised of a vehicle, a kaolin slurry and a pigment dispersion. Specifically, the vehicle is comprised of casein protein and potassium sorbate. Such paints are non-toxic and have a substantially long wet-shelf life.
    Type: Application
    Filed: February 12, 2002
    Publication date: November 21, 2002
    Inventors: Whitney A. Walker, Richard K. Walker, Clark A. Higginbotham, Lisa M. Hahn
  • SMA resin amic acids
    Patent number: 6232405
    Abstract: Water soluble SMA resin amic acids are provided, as are methods for using the same to prepare water based pigment dispersions and inks.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: May 15, 2001
    Assignee: Atofina Chemicals, Inc.
    Inventors: John C. Schmidhauser, Lisa M. Hahn