Patents by Inventor Roger M. Plourde

Roger M. Plourde 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).

  • Paper making processes using enzyme and polymer combinations
    Patent number: 6939437
    Abstract: Methods of making paper or paperboard are described. In one method, at least one cellulytic enzyme composition and at least one cationic polymer composition are introduced to a paper making pulp at about the same time to form a treated pulp. The pulp may also be treated with at least one cationic starch. The resulting pulp is formed into a sheet of pulp. Other paper making processes are also described. A paper making apparatus is also described for carrying out the methods. Paper and paperboard made according to the methods are also described.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: September 6, 2005
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Walter B. Hill, Jr., Richard L. Barclay, James A. O'Malley, Randall W. Conrod, John Desjardins, Roger M. Plourde