Granted Patent
Utility
US 5,591,304 · App. 08/317,828
Method for the use of enzymes in bleaching paper pulp
Inventors:
Jeffrey S. Tolan, Brian Foody
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Oct 4, 1994
Inventors
Jeffrey S. Tolan
Brian Foody
Assignee (at issue)
Von Kreisler Selting Werner
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.