Patents by Inventor Derek Graham

Derek Graham 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).

  • Multi-ply paper and paperboard having a wet-laid ply and a dry-laid ply
    Patent number: 3954554
    Abstract: A method and apparatus for making a multi-ply paper sheet wherein a first web is formed by wet-laying fibres and a second web is formed by dry-laying fibres, the two webs being combined to form a multi-ply sheet and wherein the dry-laid web is produced by depositing dry fibres on a supporting band and consolidating the web by hot moist pressing before transferring to the first wet-laid web.
    Type: Grant
    Filed: August 21, 1973
    Date of Patent: May 4, 1976
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Harold George Curry, Brian William Attwood, Derek Graham Walter White