Patents by Inventor Gordon R. Sneddon

Gordon R. Sneddon 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).

  • Composition and method of deinking of recycled cellulosic material
    Patent number: 5073234
    Abstract: A method for deinking recycled waste cellulosic material such as newsprint includes pulping the waste in the presence of an aqueous dispersion of a resin precursor, curable in said dispersion and curing the resin precursor during the pulping operation.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: December 17, 1991
    Assignee: Albright & Wilson Limited
    Inventors: Christopher C. Mollett, Gordon R. Sneddon
  • Composition wherein recycled cellulosic pulp is deinked
    Patent number: 4919754
    Abstract: A composition containing an aqueous, recycled cellulosic fibre pulp, print pigments contaminating the pulp, from 0.1% to 10% based on the weight of the pulp solids of a curable precursor of a solid polymer resin which is not substantive to the cellulosic fibres of the pulp, and a catalyst capable of curing the resin precursor in the dispersion; wherein the resin precursor contains a mixture of a fluid prepolymer having at least two reactive functional groups per molecule and a cross-linking agent capable of reacting with the functional groups.
    Type: Grant
    Filed: March 18, 1987
    Date of Patent: April 24, 1990
    Assignee: Albright & Wilson Limited
    Inventors: Christopher C. Mollett, Gordon R. Sneddon