Patents by Inventor F. Keith Hall

F. Keith Hall 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).

  • Densification and heat treatment of paperboard produced from SCMP and other sulfite pulps
    Patent number: 4718982
    Abstract: Both the wet strength and the folding endurance of SCMP and sulfite paperboard are improved by subjecting the board to steps of densification and high temperature treatment during its production.
    Type: Grant
    Filed: August 23, 1985
    Date of Patent: January 12, 1988
    Assignee: International Paper Company
    Inventors: Roy S. Swenson, F. Keith Hall, Donald M. MacDonald, Michael Ring