Granted Patent
Utility
US 5,961,708 · App. 09/033,658
Internal sizing composition for paper
Inventors:
Claes Zetter, Olof Malmstrom, Markku Nurminen
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Mar 3, 1998
Inventors
Claes Zetter
Olof Malmstrom
Markku Nurminen
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.