Patents by Inventor Thomas Howard Murphy

Thomas Howard 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).

  • Ozone bleaching with an organic solvent and mineral acid
    Patent number: 5685953
    Abstract: A bleached pulp having a high viscosity for a given permanganate number is formed by pretreating never dried pulp with an organic solvent medium to produce a treated pulp composed of said never dried pulp in the medium and then bleaching that treated pulp using ozone at a pH of 1.5-5 to provide a bleached pulp while reducing the viscosity loss during the ozone bleaching step significantly compared to that what would occur if the medium used in the ozone bleaching were water.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: November 11, 1997
    Assignee: MacMillan Bloedel Limited
    Inventors: Marco Solinas, Thomas Howard Murphy, Adriaan Reinhard Pieter van Heiningen, Yonghao Ni
  • Vane orienter with wipers
    Patent number: 5676236
    Abstract: A strand orienter formed by a plurality of substantially planar parallel partition walls further includes a plurality of shafts extending substantially perpendicular to the partition walls, each mounting wipers in the passages in position to wipe strands that may tend to plug the orienter from the passages and off the upper edges of the partition walls over substantially the full length of these upper edges and thereby prevent plugging of the orienter.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: October 14, 1997
    Assignee: MacMillan Bloedel Limited
    Inventors: Derek Barnes, Roger Wayne Kozak, Thomas Howard Murphy