Patents by Inventor Derek H. Page

Derek H. Page 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).

  • Method for the deacidification of papers and books
    Patent number: 5433827
    Abstract: Acidic papers, books, and other sheets of cellulosic material may be deacidified and so given a prolonged life by bringing the papers, books, or other sheets of cellulosic material to be treated in intimate contact with a source of solid alkali such as calcium carbonate filled paper, at an elevated humidity and under mechanical pressure for a period long enough to produce deacidification; the process differs from other processes in that it is carried out in the solid state without the use of liquid or gaseous reactants.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: July 18, 1995
    Assignee: Pulp and Paper Research Institute of Canada
    Inventors: Derek H. Page, Anthony M. Scallan, Steven R. Middleton, Xuejun Zou
  • Process for improving and retaining pulp properties
    Patent number: 4431479
    Abstract: A method is provided for treating pulp fibres, that have already been curled which method comprises: subjecting the pulp to a heat treatment while the pulp is at a high consistency, thereby to render the curl permanent to subsequent mechanical action. This permanent curl has advantages for papermachine runnability and for increasing the toughness of the finished product.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: February 14, 1984
    Assignee: Pulp and Paper Research Institute of Canada
    Inventors: Michel Barbe, Rajinder S. Seth, Derek H. Page