Patents by Inventor Paul David Coleman

Paul David Coleman 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).

  • Process for treating and sizing paper substrates
    Patent number: 5709776
    Abstract: A process is disclosed for strengthening and sizing paper which comprises the step of applying a composition comprising (a) an isocyanate and (b) an isocyanate-reactive component comprising at least one polyol having an ethylene oxide content of at least 1%, wherein said composition does not contain water to the paper by means of an electrostatic spraying device having a linear orifice.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: January 20, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventors: Paul David Coleman, John Russell Robertson