Granted Patent
Utility
US 6,712,930 · App. 10/332,187
Method for calendering tissue paper
Inventor:
Pekka Koivukunnas
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: May 6, 2003
Inventor
Pekka Koivukunnas
Assignee (at issue)
Metso Paper Inc.
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.