Patents by Inventor Thomas H. Murphy

Thomas H. Murphy 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).

  • MODULAR SIGN APPARATUS HAVING INTEGRATED STAKE DRIVER
    Publication number: 20220343806
    Abstract: Technologies and implementations for a modular sign apparatus having an integrated post driver. The technologies and implementations facilitate assembly of a ground engaging sign including a stake driver for a vertical member of the sign apparatus.
    Type: Application
    Filed: April 23, 2021
    Publication date: October 27, 2022
    Inventors: Thomas H. Murphy, Peter Fischer
  • Solvent recovery in pulp bleaching with ozone
    Patent number: 5507913
    Abstract: A process for bleaching pulp by impregnating the pulp with an aqueous organic solvent medium and then bleaching in an ozone stage (Z stage) to form a bleached pulp characterized in that organic solvent in the organic solvent medium accompanying the pulp through the ozone stage is neutralized and stripped from the bleached pulp leaving the ozone stage and the separated organic solvent is recovered for reuse.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: April 16, 1996
    Assignee: MacMillan Bloedel Limited
    Inventors: Thomas H. Murphy, Robert G. Norris
  • Nitric oxide treatment for ozone bleaching
    Patent number: 5364503
    Abstract: A method of bleaching a chemical pulp by adjusting the pH of the pulp to 1.5-3.5, chelating the pulp and then treating the pulp in an N stage with nitric oxide (NO) in the amount of at least 1.5% by weight of the oven dried pulp at a consistency of between 30 and 55% and further treating the pulp in a Z stage with ozone to produce a bleach pulp having a higher viscosity for a given permanganate number compared with a similar pulp bleached without using the N stage.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: November 15, 1994
    Assignee: MacMillan Bloedel Limited
    Inventors: Marco Solinas, Thomas H. Murphy