Patents by Inventor Elwood W. Cooper, III

Elwood W. Cooper, III 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 paper machine stock containing bleached hardwood pulp with an enzyme mixture to reduce vessel element picking
    Patent number: 5770012
    Abstract: The process uses a mixture of cellulases and xylanases to chemically change the hardwood vessel elements, rendering them susceptible to breaking under normal mill refining, thus not requiring any additional refining equipment. The process involves treating bleached hardwood brownstock pulp with the cellulase/xylanase mixture. The use of a pure cellulase enzyme is excluded.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: June 23, 1998
    Assignee: P. H. Glatfelter Co.
    Inventor: Elwood W. Cooper, III
  • Process for treating hardwood pulp with an enzyme mixture to reduce vessel element picking
    Patent number: 5725732
    Abstract: The process uses a mixture of cellulases and xylanases to chemically change the hardwood vessel elements, rendering them susceptible to breaking under normal mill refining, thus not requiring any additional refining equipment. The process involves treating hardwood brownstock (unbleached) pulp with a cellulase/xylanase mixture. The use of a pure cellulase enzyme is excluded.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: March 10, 1998
    Assignee: P. H. Glatfelter Company
    Inventor: Elwood W. Cooper, III