Granted Patent
Utility
US 6,187,144 · App. 09/053,644
Method for sizing paper
Inventors:
Hannu Ketola, Tuija Andersson, Asko Karppi, Sauli Laakso, Antti Likitalo
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Apr 2, 1998
Inventors
Hannu Ketola
Tuija Andersson
Asko Karppi
Sauli Laakso
Antti Likitalo
Assignee (at issue)
Raisio Chemicals OY
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.